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JavaScript ES6+
TypeScript 5
React Native New Arch (JSI)
Expo SDK & Router
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Push Notifications & Auth
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Devansh Ahuja
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Stage 1: Day-1 Foundations & Core Mental Models
Stage 2: Applied Engineering, Data & API Workflows
Stage 3: Internals, Concurrency, Security & Performance
Stage 4: Production Architecture, Testing, CI/CD & Expert Mastery
Module Learning & Hands-On Objectives
Why React Native is NOT a WebView wrapper: React components reconcile into C++ Yoga/Fabric Shadow Nodes mounted as real platform views, powered by Hermes bytecode and zero-serialization C++ JSI.
💡 Self-Explanatory Overview: In simple, everyday terms, React Native Overview — Native OEM Views (`UIView` / `android.view.View`), Hermes, JSI & Fabric teaches you how React Native applications why React Native is NOT a WebView wrapper: React components reconcile into C++ Yoga/Fabric Shadow Nodes mounted as real platform views, powered by Hermes bytecode and zero-serialization C++ JSI. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply React Native Overview — Native OEM Views (`UIView` / `android.view.View`), Hermes, JSI & Fabric in real React Native systems — specifically: Why React Native is NOT a WebView wrapper: React components reconcile into C++ Yoga/Fabric Shadow Nodes mounted as real platform views, powered by Hermes bytecode and zero-serialization C++ JSI, so your code stays reliable, fast, and easy to maintain in production.
React Native Tutorial provides basic and advanced concepts of Discrete mathematics. Our React Native Tutorial is designed for beginners and professionals both. React Native is a JavaScript Framework which is used to develop mobile applications for iOS and Android. Our React Native tutorial includes all the topics which help to learn TypeScript. These are React Native Introduction, Environment Setup, First App Hello W...
React Native Overview — Native OEM Views (`UIView` / `android.view.View`), Hermes, JSI & Fabric — Practical Assignment
Implement a production-ready React Native New Architecture (JSI/Fabric) & Expo solution demonstrating React Native Overview — Native OEM Views (`UIView` / `android.view.View`), Hermes, JSI & Fabric us...
React Native Overview — Native OEM Views (`UIView` / `android.view.View`), Hermes, JSI & Fabric — Hands-On Lab Task
import React from 'react';
import { Text, View } from 'react-native';
export function getEngineProfile(g = globalThis) {
const hermes = Boolean(g.HermesInternal);
const fabric = Boolean(g.nativeFabricUIManager);
return `Hermes=${hermes} | Fabric=${fabric}` as const;
}
export default function EngineBadge() {
return <View><Text>{getEngineProfile({ HermesInternal: {}, nativeFabricUIManager: {} })}</Text></View>;
}Bootstrap modern React Native apps as recommended by the official React Native docs using Expo (`npx create-expo-app`), Continuous Native Generation (`npx expo run:android` / `run:ios`), Metro bundler, and Fast Refresh.
💡 Self-Explanatory Overview: In simple, everyday terms, Environment Setup — Expo SDK (`create-expo-app`), Development Builds (CNG), Metro & Fast Refresh teaches you how React Native applications bootstrap modern React Native apps as recommended by the official React Native docs using Expo (`npx create-expo-app`), Continuous Native Generation (`npx expo run:android` / `run:ios`), Metro bundler, and Fast Refresh. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply Environment Setup — Expo SDK (`create-expo-app`), Development Builds (CNG), Metro & Fast Refresh in real React Native systems — specifically: Bootstrap modern React Native apps as recommended by the official React Native docs using Expo (`npx create-expo-app`), Continuous Native Generation (`npx expo run:android` / `run:ios`), Metro bundler, and Fast Refresh, so your code stays reliable, fast, and easy to maintain in production.
There is a different alternative for React Native environment setup (installation), depends upon the operating system you use. The instructions are quite different for each development and target operating system. In this tutorial, we will use Windows as a development operating system and Android as a target operating system. Developing app using React Native framework requires Node, React Native command line interfa...
Environment Setup — Expo SDK (`create-expo-app`), Development Builds (CNG), Metro & Fast Refresh — Practical Assignment
Implement a production-ready React Native New Architecture (JSI/Fabric) & Expo solution demonstrating Environment Setup — Expo SDK (`create-expo-app`), Development Builds (CNG), Metro & Fast Refresh u...
Environment Setup — Expo SDK (`create-expo-app`), Development Builds (CNG), Metro & Fast Refresh — Hands-On Lab Task
import { Platform } from 'react-native';
export function resolveLocalDevApi(os = Platform.OS) {
const host = os === 'android' ? '10.0.2.2' : 'localhost';
return `http://${host}:8000/api/v1`;
}
console.log(resolveLocalDevApi('android'), '|', resolveLocalDevApi('ios'));Create a React Native diagnostics helper inspecting global JSI/Fabric/Hermes runtime flags (`global.HermesInternal`, `global.nativeFabricUIManager`) and validating `app.json` bundle identifiers and permissions.
Module Learning & Hands-On Objectives
Understand why raw strings cannot sit directly inside `<View>`, how `{items.length && <List />}` crashes production apps when `length === 0`, and how `<Text>` inherits typography from parent `<Text>` nodes.
💡 Self-Explanatory Overview: In simple, everyday terms, First React Native App — `<Text>` Containment Rule, Falsy `0` Crash & `SafeAreaProvider` teaches you how React Native applications understand why raw strings cannot sit directly inside `<View>`, how `{items.length && <List />}` crashes production apps when `length === 0`, and how `<Text>` inherits typography from parent `<Text>` nodes. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply First React Native App — `<Text>` Containment Rule, Falsy `0` Crash & `SafeAreaProvider` in real React Native systems — specifically: Understand why raw strings cannot sit directly inside `<View>`, how `{items.length && <List />}` crashes production apps when `length === 0`, and how `<Text>` inherits typography from parent `<Text>` nodes, so your code stays reliable, fast, and easy to maintain in production.
Let's build our first React Native application on Windows as development operating system and Android as target operating system. Steps to create React Native application 1. First, you have to start your emulator (Android Emulator) and make it live. 2. Create a directory (ReactNative) in your any drive. 3. Open "Command Prompt" and go to your ReactNative directory. 4. Write a command react-native init...
First React Native App — `<Text>` Containment Rule, Falsy `0` Crash & `SafeAreaProvider` — Practical Assignment
Implement a production-ready React Native New Architecture (JSI/Fabric) & Expo solution demonstrating First React Native App — `<Text>` Containment Rule, Falsy `0` Crash & `SafeAreaProvider` using <Sa...
First React Native App — `<Text>` Containment Rule, Falsy `0` Crash & `SafeAreaProvider` — Hands-On Lab Task
import React from 'react';
import { Text, View } from 'react-native';
export default function WelcomeBanner({ student = 'Aarav', pendingMocks = 0 }) {
return (
<View>
<Text>Welcome, <Text style={{ fontWeight: '700' }}>{student}</Text></Text>
{pendingMocks > 0 ? <Text>{pendingMocks} Due</Text> : <Text>All Clear!</Text>}
</View>
);
}Master React Native’s fundamental layout box `<View>`: Fabric view flattening (`collapsable`), pass-through touch overlays (`pointerEvents="box-none"`), `onLayout` synchronous Fabric reads, and screen-reader grouping.
💡 Self-Explanatory Overview: In simple, everyday terms, React Native `<View>` — Native Mapping, View Flattening (`collapsable`), `pointerEvents` & `onLayout` teaches you how React Native applications master React Native’s fundamental layout box `<View>`: Fabric view flattening (`collapsable`), pass-through touch overlays (`pointerEvents="box-none"`), `onLayout` synchronous Fabric reads, and screen-reader grouping. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply React Native `<View>` — Native Mapping, View Flattening (`collapsable`), `pointerEvents` & `onLayout` in real React Native systems — specifically: Master React Native’s fundamental layout box `<View>`: Fabric view flattening (`collapsable`), pass-through touch overlays (`pointerEvents="box-none"`), `onLayout` synchronous Fabric reads, and screen-reader grouping, so your code stays reliable, fast, and easy to maintain in production.
The View is the fundamental component of React Native for building a user interface. It is a container that supports layout with flexbox, style, touch handling, and accessibility controls. It maps directly to the native view similar to whatever platform on React Native app is running on. It displays the components regardless with UIView, <div>, android.view, etc. View component can be nested, contains other vie...
React Native `<View>` — Native Mapping, View Flattening (`collapsable`), `pointerEvents` & `onLayout` — Practical Assignment
Implement a production-ready React Native New Architecture (JSI/Fabric) & Expo solution demonstrating React Native `<View>` — Native Mapping, View Flattening (`collapsable`), `pointerEvents` & `onLayo...
React Native `<View>` — Native Mapping, View Flattening (`collapsable`), `pointerEvents` & `onLayout` — Hands-On Lab Task
export function parseLayoutEvent(nativeEvent) {
const { width, height } = nativeEvent.layout;
const orientation = width > height ? 'LANDSCAPE' : 'PORTRAIT';
const w = Math.round(width);
const h = Math.round(height);
return `${w}x${h} (${orientation})`;
}
const sample = { layout: { x: 0, y: 0, width: 393, height: 852 } };
console.log(parseLayoutEvent(sample));Build a reusable `<CourseHeroCard>` using `<View>`, nested `<Text>` style inheritance, safe boolean rendering (`count > 0 ? ... : null`), and dynamic top/bottom safe-area inset padding.
Module Learning & Hands-On Objectives
Configure mobile components cleanly via immutable `props`, ES6 default parameter destructuring (replacing deprecated `defaultProps` in React 19), slot `children`, and `React.memo` shallow equality.
💡 Self-Explanatory Overview: In simple, everyday terms, React Native Props — Read-Only Data Flow, ES6 Default Params, `children` & `React.memo` teaches you how React Native applications configure mobile components cleanly via immutable `props`, ES6 default parameter destructuring (replacing deprecated `defaultProps` in React 19), slot `children`, and `React.memo` shallow equality. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply React Native Props — Read-Only Data Flow, ES6 Default Params, `children` & `React.memo` in real React Native systems — specifically: Configure mobile components cleanly via immutable `props`, ES6 default parameter destructuring (replacing deprecated `defaultProps` in React 19), slot `children`, and `React.memo` shallow equality, so your code stays reliable, fast, and easy to maintain in production.
The properties of React Native components are simply pronounced as props. In React Native, most of the components can be customized at the time of their creation with different parameters. These parameters are known as props. They are immutable, and they cannot be changed. One of the examples of props is a source property if Image component which controls the image is displayed over the device screen. React Native De...
React Native Props — Read-Only Data Flow, ES6 Default Params, `children` & `React.memo` — Practical Assignment
Implement a production-ready React Native New Architecture (JSI/Fabric) & Expo solution demonstrating React Native Props — Read-Only Data Flow, ES6 Default Params, `children` & `React.memo` using func...
React Native Props — Read-Only Data Flow, ES6 Default Params, `children` & `React.memo` — Hands-On Lab Task
export function formatPriceBadge({
mrp = 4999,
offer = 999,
currency = 'Rs.',
} = {}) {
const offPct = Math.round(((mrp - offer) / mrp) * 100);
return `${currency}${offer} (${offPct}% OFF from ${currency}${mrp})`;
}
console.log(formatPriceBadge({ mrp: 4999, offer: 999 }));Drive reactive UI updates with `useState` and `useReducer`, understand React 18/19 automatic state batching across async promises/timers, and eliminate stale closures and in-place mutation bugs.
💡 Self-Explanatory Overview: In simple, everyday terms, React Native State — `useState`, Functional Updaters, Immutable Arrays & `Object.is` Batching teaches you how React Native applications drive reactive UI updates with `useState` and `useReducer`, understand React 18/19 automatic state batching across async promises/timers, and eliminate stale closures and in-place mutation bugs. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply React Native State — `useState`, Functional Updaters, Immutable Arrays & `Object.is` Batching in real React Native systems — specifically: Drive reactive UI updates with `useState` and `useReducer`, understand React 18/19 automatic state batching across async promises/timers, and eliminate stale closures and in-place mutation bugs, so your code stays reliable, fast, and easy to maintain in production.
There are two types of data state and props in React Native which control the component. The component that uses the state is mutable. They can be changed later on if required. The props component is immutable, and it is fixed throughout the lifetime. The state is generally initialized in constructor and then call setState when we want to change it. React Native state Example 1 In this example, we create a Text compo...
React Native State — `useState`, Functional Updaters, Immutable Arrays & `Object.is` Batching — Practical Assignment
Implement a production-ready React Native New Architecture (JSI/Fabric) & Expo solution demonstrating React Native State — `useState`, Functional Updaters, Immutable Arrays & `Object.is` Batching usin...
React Native State — `useState`, Functional Updaters, Immutable Arrays & `Object.is` Batching — Hands-On Lab Task
export function toggleTopicBookmark(prevIds, topicId) {
return prevIds.includes(topicId)
? prevIds.filter((id) => id !== topicId)
: [...prevIds, topicId];
}
const s1 = toggleTopicBookmark([101, 102], 103);
const s2 = toggleTopicBookmark(s1, 101);
console.log('Bookmarks:', s2.join(','));Build a memoized `<QuestionOptionCard>` paired with a pure quiz state reducer (`SELECT_OPTION`, `TICK_SECOND`, `SUBMIT_QUIZ`) that guarantees immutable transitions and zero stale-closure score bugs.
Module Learning & Hands-On Objectives
Style components with unitless density-independent numbers, camelCase CSS subsets, `StyleSheet.absoluteFillObject`, `StyleSheet.hairlineWidth` 1-physical-pixel dividers, and cross-platform shadows.
💡 Self-Explanatory Overview: In simple, everyday terms, React Native StyleSheet — `StyleSheet.create`, Array Merging, `hairlineWidth` & Platform Shadows teaches you how React Native applications style components with unitless density-independent numbers, camelCase CSS subsets, `StyleSheet.absoluteFillObject`, `StyleSheet.hairlineWidth` 1-physical-pixel dividers, and cross-platform shadows. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply React Native StyleSheet — `StyleSheet.create`, Array Merging, `hairlineWidth` & Platform Shadows in real React Native systems — specifically: Style components with unitless density-independent numbers, camelCase CSS subsets, `StyleSheet.absoluteFillObject`, `StyleSheet.hairlineWidth` 1-physical-pixel dividers, and cross-platform shadows, so your code stays reliable, fast, and easy to maintain in production.
React Native simply uses JavaScript for styling our core components. We don't require any special language or syntax for defining styles. All the core components use a prop (property) named style. The style names and values are similar to CSS that works for the web. There is the only difference in the way of writing names using camel casing, e.g fontSize rather than font-size. The style prop is a plain old JavaS...
React Native StyleSheet — `StyleSheet.create`, Array Merging, `hairlineWidth` & Platform Shadows — Practical Assignment
Implement a production-ready React Native New Architecture (JSI/Fabric) & Expo solution demonstrating React Native StyleSheet — `StyleSheet.create`, Array Merging, `hairlineWidth` & Platform Shadows u...
React Native StyleSheet — `StyleSheet.create`, Array Merging, `hairlineWidth` & Platform Shadows — Hands-On Lab Task
export function buildShadowToken(level = 2) {
return {
backgroundColor: '#FFFFFF',
elevation: level * 2,
shadowColor: '#0F172A',
shadowOffset: { width: 0, height: level },
shadowOpacity: Number((0.06 * level).toFixed(2)),
shadowRadius: level * 3,
};
}
const t = buildShadowToken(3);
console.log(`elevation=${t.elevation} | shadowOpacity=${t.shadowOpacity} | radius=${t.shadowRadius}`);Choose between fixed density-independent dimensions, proportional `flex` weights, percentage strings (`"50%"`), `aspectRatio`, and rotation-reactive `useWindowDimensions()`.
💡 Self-Explanatory Overview: In simple, everyday terms, Height & Width — DP Units, Flex Proportions, Percentage Sizing & `useWindowDimensions()` teaches you how React Native applications choose between fixed density-independent dimensions, proportional `flex` weights, percentage strings (`"50%"`), `aspectRatio`, and rotation-reactive `useWindowDimensions()`. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply Height & Width — DP Units, Flex Proportions, Percentage Sizing & `useWindowDimensions()` in real React Native systems — specifically: Choose between fixed density-independent dimensions, proportional `flex` weights, percentage strings (`"50%"`), `aspectRatio`, and rotation-reactive `useWindowDimensions()`, so your code stays reliable, fast, and easy to maintain in production.
The height and width determine the size of component on the screen. There are two different ways to set the height and width of component: Fixed Dimensions and Flex Dimensions. Fixed Dimensions Using fixed height and fixed width in style is the simplest way to set the dimension of the component. The dimensions of React Native component are unit-less, and they represent density-independent pixels. Setting the dimensio...
Height & Width — DP Units, Flex Proportions, Percentage Sizing & `useWindowDimensions()` — Practical Assignment
Implement a production-ready React Native New Architecture (JSI/Fabric) & Expo solution demonstrating Height & Width — DP Units, Flex Proportions, Percentage Sizing & `useWindowDimensions()` using con...
Height & Width — DP Units, Flex Proportions, Percentage Sizing & `useWindowDimensions()` — Hands-On Lab Task
export function computeResponsiveCard({ width, scale }) {
const columns = width >= 768 ? 3 : width >= 480 ? 2 : 1;
const horizontalPadding = 32;
const gap = (columns - 1) * 12;
const cardDp = Math.floor((width - horizontalPadding - gap) / columns);
return { columns, cardDp, cdnPx: Math.round(cardDp * scale) };
}
const res = computeResponsiveCard({ width: 392, scale: 3 });
console.log(`cols=${res.columns} | card=${res.cardDp}dp | cdn=${res.cdnPx}px`);Create a design-token helper generating unified iOS + Android elevation style objects for levels `1..5`, paired with a `useWindowDimensions`-compatible breakpoint classifier handling portrait, landscape, and foldable split-screen widths.
Module Learning & Hands-On Objectives
Master Yoga C++ layout rules: `flexDirection`, `justifyContent` (main axis), `alignItems` (cross axis), modern `gap` spacing, and why `flex: 1` inside a `<View>` needs a bounded parent height.
💡 Self-Explanatory Overview: In simple, everyday terms, Layout & Yoga Flexbox — `flexDirection: "column"` Default, `gap` & Text `flexShrink: 1` teaches you how React Native applications master Yoga C++ layout rules: `flexDirection`, `justifyContent` (main axis), `alignItems` (cross axis), modern `gap` spacing, and why `flex: 1` inside a `<View>` needs a bounded parent height. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply Layout & Yoga Flexbox — `flexDirection: "column"` Default, `gap` & Text `flexShrink: 1` in real React Native systems — specifically: Master Yoga C++ layout rules: `flexDirection`, `justifyContent` (main axis), `alignItems` (cross axis), modern `gap` spacing, and why `flex: 1` inside a `<View>` needs a bounded parent height, so your code stays reliable, fast, and easy to maintain in production.
React Native Flexbox is an algorithm to specify the layout of component's children. It provides a consistent layout on different screen sizes. Property of Flexbox Flexbox provides three main properties to achieve the desired layout. These properties are: flexDirection, justifyContent, and alignItems. PropertyValuesDescription flexDirection'column', 'row'Used to align its elements vertically o...
Layout & Yoga Flexbox — `flexDirection: "column"` Default, `gap` & Text `flexShrink: 1` — Practical Assignment
Implement a production-ready React Native New Architecture (JSI/Fabric) & Expo solution demonstrating Layout & Yoga Flexbox — `flexDirection: "column"` Default, `gap` & Text `flexShrink: 1` using flex...
Layout & Yoga Flexbox — `flexDirection: "column"` Default, `gap` & Text `flexShrink: 1` — Hands-On Lab Task
export function auditRowTextChild(containerStyle, textStyle) {
const isRow = containerStyle.flexDirection === 'row';
const canShrink = textStyle.flex === 1 || textStyle.flexShrink === 1;
if (isRow && !canShrink) return 'WARN: Text may push sibling icons off-screen';
return `SAFE_YOGA_ROW (gap=${containerStyle.gap ?? 0}dp)`;
}
console.log(auditRowTextChild({ flexDirection: 'row', gap: 12 }, { flex: 1 }));Capture text cleanly via `value` + `onChangeText` (note: passes the string directly, NOT `e.target.value`!), configure mobile keyboards, chain focus with `useRef`, and prevent soft keyboards from covering inputs.
💡 Self-Explanatory Overview: In simple, everyday terms, React Native `<TextInput>` — `onChangeText`, IME `keyboardType`, Focus Refs & `KeyboardAvoidingView` teaches you how React Native applications capture text cleanly via `value` + `onChangeText` (note: passes the string directly, NOT `e.target.value`!), configure mobile keyboards, chain focus with `useRef`, and prevent soft keyboards from covering inputs. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply React Native `<TextInput>` — `onChangeText`, IME `keyboardType`, Focus Refs & `KeyboardAvoidingView` in real React Native systems — specifically: Capture text cleanly via `value` + `onChangeText` (note: passes the string directly, NOT `e.target.value`!), configure mobile keyboards, chain focus with `useRef`, and prevent soft keyboards from covering inputs, so your code stays reliable, fast, and easy to maintain in production.
TextInput is the fundamental component to input text. It has several props which configure the different features, such as onChangeText that takes a function and call it whenever the text changed. The onSubmitEditing prop takes a function, which is called when the text submitted. There are several things, which can be performed with text input, such as validating the text inside while user types. React Native TextInp...
React Native `<TextInput>` — `onChangeText`, IME `keyboardType`, Focus Refs & `KeyboardAvoidingView` — Practical Assignment
Implement a production-ready React Native New Architecture (JSI/Fabric) & Expo solution demonstrating React Native `<TextInput>` — `onChangeText`, IME `keyboardType`, Focus Refs & `KeyboardAvoidingVie...
React Native `<TextInput>` — `onChangeText`, IME `keyboardType`, Focus Refs & `KeyboardAvoidingView` — Hands-On Lab Task
export function buildEmailInputProps(rawEmail, platformOs = 'ios') {
return {
normalized: rawEmail.trim().toLowerCase(),
keyboardType: 'email-address',
autoCapitalize: 'none',
avoidingBehavior: platformOs === 'ios' ? 'padding' : 'height',
};
}
const cfg = buildEmailInputProps(' Aarav@MockAttempt.COM ', 'ios');
console.log(`${cfg.normalized} | cap=${cfg.autoCapitalize} | kav=${cfg.avoidingBehavior}`);Create a controlled login form validation hook handling email normalization (`trim` + lowercase), password masking toggles, and platform-specific `KeyboardAvoidingView` behavior (`"padding"` on iOS vs `"height"`/windowSoftInputMode on Android).
Module Learning & Hands-On Objectives
Use the built-in `<Button title="..." onPress={...} color="..." disabled />` for quick prototypes and alert actions while understanding why it purposefully rejects custom `style`, border radius, and icons.
💡 Self-Explanatory Overview: In simple, everyday terms, React Native `<Button>` — Native `UIBarButton` / Material Button Rendering & Customization Limits teaches you how React Native applications use the built-in `<Button title="..." onPress={...} color="..." disabled />` for quick prototypes and alert actions while understanding why it purposefully rejects custom `style`, border radius, and icons. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply React Native `<Button>` — Native `UIBarButton` / Material Button Rendering & Customization Limits in real React Native systems — specifically: Use the built-in `<Button title="..." onPress={...} color="..." disabled />` for quick prototypes and alert actions while understanding why it purposefully rejects custom `style`, border radius, and icons, so your code stays reliable, fast, and easy to maintain in production.
Most users interact with mobile through touches. There are combinations of gestures that work on it, such as tapping on the button, zooming the map, scrolling a list, etc. A button is one of the components that work on its click. React Native Button is a basic component that works by clicking on it. It imports the Button class of react-native. Props of Button PropTypeRequiredDescription onPressfunctionyesCall the han...
React Native `<Button>` — Native `UIBarButton` / Material Button Rendering & Customization Limits — Practical Assignment
Implement a production-ready React Native New Architecture (JSI/Fabric) & Expo solution demonstrating React Native `<Button>` — Native `UIBarButton` / Material Button Rendering & Customization Limits...
React Native `<Button>` — Native `UIBarButton` / Material Button Rendering & Customization Limits — Hands-On Lab Task
export function describeNativeButton(os, color = '#2563EB', disabled = false) {
if (disabled) return `${os.toUpperCase()}: Button Disabled (greyed out)`;
return os === 'ios'
? `IOS: Text tinted ${color} (transparent background)`
: `ANDROID: Filled background ${color} (elevated rectangle)`;
}
console.log(describeNativeButton('ios'), '|', describeNativeButton('android'));Master touch handling from `TouchableOpacity` / `TouchableHighlight` / `TouchableWithoutFeedback` to the modern core `<Pressable>` API supporting `onPressIn`, `onLongPress`, `({ pressed })` render callbacks, `android_ripple`, and `hitSlop`.
💡 Self-Explanatory Overview: In simple, everyday terms, Touchables & `<Pressable>` — `TouchableOpacity` vs Future-Proof `<Pressable>`, `android_ripple` & `hitSlop` teaches you how React Native applications master touch handling from `TouchableOpacity` / `TouchableHighlight` / `TouchableWithoutFeedback` to the modern core `<Pressable>` API supporting `onPressIn`, `onLongPress`, `({ pressed })` render callbacks, `android_ripple`, and `hitSlop`. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply Touchables & `<Pressable>` — `TouchableOpacity` vs Future-Proof `<Pressable>`, `android_ripple` & `hitSlop` in real React Native systems — specifically: Master touch handling from `TouchableOpacity` / `TouchableHighlight` / `TouchableWithoutFeedback` to the modern core `<Pressable>` API supporting `onPressIn`, `onLongPress`, `({ pressed })` render callbacks, `android_ripple`, and `hitSlop`, so your code stays reliable, fast, and easy to maintain in production.
Touchable components provide the capability to capture the tapping functionality. The touchables component can be implemented as an alternative of basic button, if they are not look right for your app. Using these components, you build your own button. Tapping on these components, you can display the feedback. The touchables components do not provide any default styling, so you will need to do your style for presenti...
Touchables & `<Pressable>` — `TouchableOpacity` vs Future-Proof `<Pressable>`, `android_ripple` & `hitSlop` — Practical Assignment
Implement a production-ready React Native New Architecture (JSI/Fabric) & Expo solution demonstrating Touchables & `<Pressable>` — `TouchableOpacity` vs Future-Proof `<Pressable>`, `android_ripple` &...
Touchables & `<Pressable>` — `TouchableOpacity` vs Future-Proof `<Pressable>`, `android_ripple` & `hitSlop` — Hands-On Lab Task
export function computeHitSlop(iconSizeDp, minTargetDp = 44) {
if (iconSizeDp >= minTargetDp) return 0;
const pad = Math.ceil((minTargetDp - iconSizeDp) / 2);
return { top: pad, bottom: pad, left: pad, right: pad };
}
const slop = computeHitSlop(20);
console.log(`20dp Icon -> hitSlop=${slop.top}dp each side (effective=${20 + slop.top * 2}dp)`);Engineer a reusable cross-platform button state helper supporting `primary`, `outline`, and `ghost` variants, pressed-opacity scaling on iOS, native Material `android_ripple` on Android, `disabled || loading` guards, and `accessibilityState`.
Module Learning & Hands-On Objectives
Use `<ScrollView>` for bounded forms and article pages (< 25 items), understand `style` vs `contentContainerStyle`, pull-to-refresh (`RefreshControl`), and `keyboardShouldPersistTaps="handled"`.
💡 Self-Explanatory Overview: In simple, everyday terms, React Native `<ScrollView>` — `contentContainerStyle`, `keyboardShouldPersistTaps` & Eager Mounting teaches you how React Native applications use `<ScrollView>` for bounded forms and article pages (< 25 items), understand `style` vs `contentContainerStyle`, pull-to-refresh (`RefreshControl`), and `keyboardShouldPersistTaps="handled"`. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply React Native `<ScrollView>` — `contentContainerStyle`, `keyboardShouldPersistTaps` & Eager Mounting in real React Native systems — specifically: Use `<ScrollView>` for bounded forms and article pages (< 25 items), understand `style` vs `contentContainerStyle`, pull-to-refresh (`RefreshControl`), and `keyboardShouldPersistTaps="handled"`, so your code stays reliable, fast, and easy to maintain in production.
The ScrollView is a generic scrollable container, which scrolls multiple child components and views inside it. In the ScrollView, we can scroll the components in both direction vertically and horizontally. By default, the ScrollView container scrolls its components and views in vertical. To scroll its components in horizontal, it uses the props horizontal: true (default, horizontal: false). Props of ScrollView always...
React Native `<ScrollView>` — `contentContainerStyle`, `keyboardShouldPersistTaps` & Eager Mounting — Practical Assignment
Implement a production-ready React Native New Architecture (JSI/Fabric) & Expo solution demonstrating React Native `<ScrollView>` — `contentContainerStyle`, `keyboardShouldPersistTaps` & Eager Mountin...
React Native `<ScrollView>` — `contentContainerStyle`, `keyboardShouldPersistTaps` & Eager Mounting — Hands-On Lab Task
export function auditScrollSetup({ itemCount, hasTextInput, keyboardTaps }) {
if (itemCount > 30) {
return 'SWITCH_TO_FLATLIST: Eager ScrollView mounts all items';
}
if (hasTextInput && keyboardTaps !== 'handled') {
return 'WARN: Set keyboardShouldPersistTaps="handled"';
}
return `SCROLLVIEW_OK (items=${itemCount})`;
}
console.log(auditScrollSetup({ itemCount: 12, hasTextInput: true, keyboardTaps: 'handled' }));Render massive datasets smoothly with `<FlatList>`: `VirtualizedList` viewport windowing (`windowSize`, `initialNumToRender`, `maxToRenderPerBatch`), `ListEmptyComponent`, `ListHeaderComponent`, and O(1) `getItemLayout`.
💡 Self-Explanatory Overview: In simple, everyday terms, React Native `<FlatList>` — `VirtualizedList` Windowing, `keyExtractor` & `getItemLayout` teaches you how React Native applications render massive datasets smoothly with `<FlatList>`: `VirtualizedList` viewport windowing (`windowSize`, `initialNumToRender`, `maxToRenderPerBatch`), `ListEmptyComponent`, `ListHeaderComponent`, and O(1) `getItemLayout`. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply React Native `<FlatList>` — `VirtualizedList` Windowing, `keyExtractor` & `getItemLayout` in real React Native systems — specifically: Render massive datasets smoothly with `<FlatList>`: `VirtualizedList` viewport windowing (`windowSize`, `initialNumToRender`, `maxToRenderPerBatch`), `ListEmptyComponent`, `ListHeaderComponent`, and O(1) `getItemLayout`, so your code stays reliable, fast, and easy to maintain in production.
The FlatList component displays the similar structured data in a scrollable list. It works well for large lists of data where the number of list items might change over time. The FlatList shows only those renders elements which are currently displaying on the screen, not all the elements of the list at once. The FlatList component takes two required props: data and renderItem. The data is the source of elements for t...
React Native `<FlatList>` — `VirtualizedList` Windowing, `keyExtractor` & `getItemLayout` — Practical Assignment
Implement a production-ready React Native New Architecture (JSI/Fabric) & Expo solution demonstrating React Native `<FlatList>` — `VirtualizedList` Windowing, `keyExtractor` & `getItemLayout` using <F...
React Native `<FlatList>` — `VirtualizedList` Windowing, `keyExtractor` & `getItemLayout` — Hands-On Lab Task
export function makeItemLayout(rowHeight, separatorHeight = 0) {
const stride = rowHeight + separatorHeight;
return (_data, index) => ({
length: rowHeight,
offset: stride * index,
index,
});
}
const layout = makeItemLayout(72, 8)(null, 25);
console.log(`index=${layout.index} | length=${layout.length} | offset=${layout.offset}`);Implement `<FlatList>` optimization helpers including deterministic `getItemLayout` offset calculation (accounting for row height + `ItemSeparatorComponent` height) and infinite-scroll cursor deduplication on `onEndReached`.
Module Learning & Hands-On Objectives
Display virtualized grouped lists (alphabetical contacts, date-grouped transactions, course modules -> topics) using `<SectionList>` with `renderSectionHeader` and `stickySectionHeadersEnabled`.
💡 Self-Explanatory Overview: In simple, everyday terms, React Native `<SectionList>` — `{ data: [...] }` Schema, `renderSectionHeader` & Sticky Headers teaches you how React Native applications display virtualized grouped lists (alphabetical contacts, date-grouped transactions, course modules -> topics) using `<SectionList>` with `renderSectionHeader` and `stickySectionHeadersEnabled`. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply React Native `<SectionList>` — `{ data: [...] }` Schema, `renderSectionHeader` & Sticky Headers in real React Native systems — specifically: Display virtualized grouped lists (alphabetical contacts, date-grouped transactions, course modules -> topics) using `<SectionList>` with `renderSectionHeader` and `stickySectionHeadersEnabled`, so your code stays reliable, fast, and easy to maintain in production.
The React Native SectionList component is a list view component which sets the list of data into broken logical section. The broken data can be implemented using its section header prop renderSectionHeader. To implement the SectionList component, we need to import SectionList from 'react-native' library. Props of SectionList sectionsrenderIteminitialNumToRenderkeyExtractor renderSectionHeaderrenderSectionFo...
React Native `<SectionList>` — `{ data: [...] }` Schema, `renderSectionHeader` & Sticky Headers — Practical Assignment
Implement a production-ready React Native New Architecture (JSI/Fabric) & Expo solution demonstrating React Native `<SectionList>` — `{ data: [...] }` Schema, `renderSectionHeader` & Sticky Headers us...
React Native `<SectionList>` — `{ data: [...] }` Schema, `renderSectionHeader` & Sticky Headers — Hands-On Lab Task
export function toSectionListData(modules, topics) {
return modules.map((m) => ({
title: m.title,
data: topics.filter((t) => t.moduleId === m.id),
}));
}
const sections = toSectionListData([{ id: 1, title: 'M1: Core' }], [{ id: 10, moduleId: 1, name: 'JSI' }, { id: 11, moduleId: 1, name: 'Setup' }]);
console.log(`${sections[0].title} -> data.length=${sections[0].data.length}`);Render bundled `@2x`/`@3x` assets via static `require()` and remote HTTPS images via `source={{ uri }}`, master `resizeMode` (`cover`, `contain`), `ImageBackground`, and `expo-image` SDWebImage/Glide disk caching.
💡 Self-Explanatory Overview: In simple, everyday terms, React Native `<Image>` — Static `require()` vs Remote `{ uri }`, `resizeMode` & `expo-image` Caching teaches you how React Native applications render bundled `@2x`/`@3x` assets via static `require()` and remote HTTPS images via `source={{ uri }}`, master `resizeMode` (`cover`, `contain`), `ImageBackground`, and `expo-image` SDWebImage/Glide disk caching. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply React Native `<Image>` — Static `require()` vs Remote `{ uri }`, `resizeMode` & `expo-image` Caching in real React Native systems — specifically: Render bundled `@2x`/`@3x` assets via static `require()` and remote HTTPS images via `source={{ uri }}`, master `resizeMode` (`cover`, `contain`), `ImageBackground`, and `expo-image` SDWebImage/Glide disk caching, so your code stays reliable, fast, and easy to maintain in production.
The Image component is used to display the image on the screen. The image can be loaded from different source such as static resources, temporary local files, local disc, network images, etc. Static Image Resources The static images are added in app by placing it in somewhere in the source code directory and provide its path as: <Image source={require('./icon_name.png')} /> In the above syntax, the pa...
React Native `<Image>` — Static `require()` vs Remote `{ uri }`, `resizeMode` & `expo-image` Caching — Practical Assignment
Implement a production-ready React Native New Architecture (JSI/Fabric) & Expo solution demonstrating React Native `<Image>` — Static `require()` vs Remote `{ uri }`, `resizeMode` & `expo-image` Cachi...
React Native `<Image>` — Static `require()` vs Remote `{ uri }`, `resizeMode` & `expo-image` Caching — Hands-On Lab Task
export function validateRemoteImage(uri, style = {}) {
if (!uri.startsWith('https://')) return 'BLOCKED_ATS: Must use https:// URI';
const hasSize = (style.width && style.height) || (style.width && style.aspectRatio);
if (!hasSize) return 'INVISIBLE_0X0: Remote Image requires width + height/aspectRatio';
return `IMAGE_READY (${style.width}dp, aspect=${style.aspectRatio ?? 'fixed'})`;
}
console.log(validateRemoteImage('https://cdn.mockattempt.com/banner.webp', { width: 360, aspectRatio: 1.77 }));Build a flat-to-grouped curriculum transformer outputting valid `<SectionList>` `sections` arrays with module completion counts, paired with a remote `<Image>` source validator enforcing HTTPS and explicit dimensions.
Module Learning & Hands-On Objectives
Animate `opacity` and `transform` (`translateX/Y`, `scale`, `rotate`) directly on the native UI thread via `useNativeDriver: true` so animations stay 60/120fps even if the JS thread is busy.
💡 Self-Explanatory Overview: In simple, everyday terms, React Native Animations — `Animated.Value`, `useNativeDriver: true`, `interpolate` & Reanimated teaches you how React Native applications animate `opacity` and `transform` (`translateX/Y`, `scale`, `rotate`) directly on the native UI thread via `useNativeDriver: true` so animations stay 60/120fps even if the JS thread is busy. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply React Native Animations — `Animated.Value`, `useNativeDriver: true`, `interpolate` & Reanimated in real React Native systems — specifically: Animate `opacity` and `transform` (`translateX/Y`, `scale`, `rotate`) directly on the native UI thread via `useNativeDriver: true` so animations stay 60/120fps even if the JS thread is busy, so your code stays reliable, fast, and easy to maintain in production.
React Native Animations provide an extra effect and great user experience in the app. Animations convey physically believable motion in your interface. There are two types of complementary animation systems in React Native. These are: Animated exports four different animated components as View, Text, Image and ScrollView. We can also create our own animated component using Animated.createAnimatedComponent(). Animated...
React Native Animations — `Animated.Value`, `useNativeDriver: true`, `interpolate` & Reanimated — Practical Assignment
Implement a production-ready React Native New Architecture (JSI/Fabric) & Expo solution demonstrating React Native Animations — `Animated.Value`, `useNativeDriver: true`, `interpolate` & Reanimated us...
React Native Animations — `Animated.Value`, `useNativeDriver: true`, `interpolate` & Reanimated — Hands-On Lab Task
export function interpolateClamped(value, [inMin, inMax], [outMin, outMax]) {
const t = Math.min(1, Math.max(0, (value - inMin) / (inMax - inMin)));
return Number((outMin + t * (outMax - outMin)).toFixed(2));
}
const opacity = interpolateClamped(75, [0, 100], [0, 1]);
const translateY = interpolateClamped(150, [0, 100], [20, 0]);
console.log(`opacity=${opacity} | clampedTranslateY=${translateY}dp`);Embed web checkout/OAuth/HTML content using community `react-native-webview` (`WKWebView` on iOS, Chromium `WebView` on Android), enforce strict `originWhitelist` rules, and pass typed messages via `window.ReactNativeWebView.postMessage`.
💡 Self-Explanatory Overview: In simple, everyday terms, React Native `<WebView>` — `react-native-webview`, `originWhitelist` & `postMessage` Bridge Security teaches you how React Native applications embed web checkout/OAuth/HTML content using community `react-native-webview` (`WKWebView` on iOS, Chromium `WebView` on Android), enforce strict `originWhitelist` rules, and pass typed messages via `window.ReactNativeWebView.postMessage`. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply React Native `<WebView>` — `react-native-webview`, `originWhitelist` & `postMessage` Bridge Security in real React Native systems — specifically: Embed web checkout/OAuth/HTML content using community `react-native-webview` (`WKWebView` on iOS, Chromium `WebView` on Android), enforce strict `originWhitelist` rules, and pass typed messages via `window.ReactNativeWebView.postMessage`, so your code stays reliable, fast, and easy to maintain in production.
React Native WebView is a component which is used to load web content or web page. The WebView component is imports form core react-native library. Now, the WebView is replaced from the built-in core react-native, and placed in react-native-webview library. Props of WebView sourceinjectJavaScriptinjectedJavaScriptonError onLoadonLoadEndonLoadStartonMessage originWhitelistrenderErrorstyleuserAgent htmlurlgeolocationEn...
React Native `<WebView>` — `react-native-webview`, `originWhitelist` & `postMessage` Bridge Security — Practical Assignment
Implement a production-ready React Native New Architecture (JSI/Fabric) & Expo solution demonstrating React Native `<WebView>` — `react-native-webview`, `originWhitelist` & `postMessage` Bridge Securi...
React Native `<WebView>` — `react-native-webview`, `originWhitelist` & `postMessage` Bridge Security — Hands-On Lab Task
const ALLOWED_ORIGINS = new Set(['https://pay.mockattempt.com']);
export function handleWebViewMessage(nativeEvent) {
const origin = new URL(nativeEvent.url).origin;
if (!ALLOWED_ORIGINS.has(origin)) return 'REJECTED_UNTRUSTED_ORIGIN';
const payload = JSON.parse(nativeEvent.data);
return `VERIFIED_${payload.type}:${payload.orderId}`;
}
console.log(handleWebViewMessage({ url: 'https://pay.mockattempt.com/done', data: '{"type":"PAID","orderId":"ORD-999"}' }));Build an `Animated` interpolation mapper converting `[0, 1]` progress values into `scale` and `translateY` transforms compatible with `useNativeDriver: true`, plus a `<WebView>` navigation gatekeeper blocking untrusted schemes (`javascript:`, external phishing domains).
Module Learning & Hands-On Objectives
Invoke native OS modal alerts via `Alert.alert(title, message, buttons, options)`, understand iOS `style: "destructive" | "cancel"` ordering, Android’s strict 3-button `AlertDialog` cap, and why `Alert.prompt` is iOS-only.
💡 Self-Explanatory Overview: In simple, everyday terms, React Native `Alert` — Imperative `Alert.alert()`, Android 3-Button Limit & Destructive Styles teaches you how React Native applications invoke native OS modal alerts via `Alert.alert(title, message, buttons, options)`, understand iOS `style: "destructive" | "cancel"` ordering, Android’s strict 3-button `AlertDialog` cap, and why `Alert.prompt` is iOS-only. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply React Native `Alert` — Imperative `Alert.alert()`, Android 3-Button Limit & Destructive Styles in real React Native systems — specifically: Invoke native OS modal alerts via `Alert.alert(title, message, buttons, options)`, understand iOS `style: "destructive" | "cancel"` ordering, Android’s strict 3-button `AlertDialog` cap, and why `Alert.prompt` is iOS-only, so your code stays reliable, fast, and easy to maintain in production.
React Native Alert is an API which is used to display an alert dialog with specified title and message. It uses an alert() method to prompt an alert dialog. This Alert dialog provides three different lists of buttons (combination of neutral, negative, and positive) to perform action. Pressing any of these buttons calls the onPress callback method and dismiss the alert. By default, Alert has only a positive (OK) butto...
React Native `Alert` — Imperative `Alert.alert()`, Android 3-Button Limit & Destructive Styles — Practical Assignment
Implement a production-ready React Native New Architecture (JSI/Fabric) & Expo solution demonstrating React Native `Alert` — Imperative `Alert.alert()`, Android 3-Button Limit & Destructive Styles usi...
React Native `Alert` — Imperative `Alert.alert()`, Android 3-Button Limit & Destructive Styles — Hands-On Lab Task
export function buildSafeAlertButtons(actions) {
if (actions.length > 3) {
throw new Error('Android AlertDialog supports at most 3 buttons; use <Modal> instead');
}
return actions.map((a) => ({ text: a.label, style: a.destructive ? 'destructive' : 'default' }));
}
const btns = buildSafeAlertButtons([{ label: 'Keep Editing' }, { label: 'End Exam', destructive: true }]);
console.log(btns.map((b) => `${b.text}[${b.style}]`).join(' | '));Request foreground/background location permissions (`NSLocationWhenInUseUsageDescription` + `ACCESS_FINE_LOCATION`), query GPS fixes with `enableHighAccuracy` and `maximumAge`, and unsubscribe watchers on unmount.
💡 Self-Explanatory Overview: In simple, everyday terms, React Native Geolocation — `expo-location` / Geolocation Permissions, Timeouts & `watchPosition` Cleanup teaches you how React Native applications request foreground/background location permissions (`NSLocationWhenInUseUsageDescription` + `ACCESS_FINE_LOCATION`), query GPS fixes with `enableHighAccuracy` and `maximumAge`, and unsubscribe watchers on unmount. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply React Native Geolocation — `expo-location` / Geolocation Permissions, Timeouts & `watchPosition` Cleanup in real React Native systems — specifically: Request foreground/background location permissions (`NSLocationWhenInUseUsageDescription` + `ACCESS_FINE_LOCATION`), query GPS fixes with `enableHighAccuracy` and `maximumAge`, and unsubscribe watchers on unmount, so your code stays reliable, fast, and easy to maintain in production.
The Geolocation API is used to get the geographical position (latitude and longitude) of a place. It extends the Geolocation web specification. This API is available through the navigator.geolocation globally, so that we do not need to import it. In Android, Geolocation API uses android.location API. However, this API is not recommended by Google because it is less accurate, and slower than the recommended Google Loc...
React Native Geolocation — `expo-location` / Geolocation Permissions, Timeouts & `watchPosition` Cleanup — Practical Assignment
Implement a production-ready React Native New Architecture (JSI/Fabric) & Expo solution demonstrating React Native Geolocation — `expo-location` / Geolocation Permissions, Timeouts & `watchPosition` C...
React Native Geolocation — `expo-location` / Geolocation Permissions, Timeouts & `watchPosition` Cleanup — Hands-On Lab Task
export function approxMetersBetween(a, b) {
const toRad = (deg) => (deg * Math.PI) / 180;
const dLat = toRad(b.lat - a.lat) * 6371000;
const dLon = toRad(b.lon - a.lon) * 6371000 * Math.cos(toRad(a.lat));
return Math.round(Math.hypot(dLat, dLon));
}
const dist = approxMetersBetween({ lat: 28.6139, lon: 77.2090 }, { lat: 28.6145, lon: 77.2095 });
console.log(`Distance=${dist}m | InsideCampus150m=${dist <= 150}`);Build a cross-platform `Alert.alert` builder enforcing Android’s 3-button ceiling (`[Neutral, Cancel, Destructive]`) and a Haversine GPS distance verifier with automatic `watchPosition` subscription cleanup.
Module Learning & Hands-On Objectives
Understand why modern React Native achieves native-grade startup and gesture latency.
💡 Self-Explanatory Overview: In simple, everyday terms, Bridgeless JSI Synchronous Calls & Fabric Concurrent Renderer teaches you how React Native applications understand why modern React Native achieves native-grade startup and gesture latency. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply Bridgeless JSI Synchronous Calls & Fabric Concurrent Renderer in real React Native systems — specifically: Understand why modern React Native achieves native-grade startup and gesture latency, so your code stays reliable, fast, and easy to maintain in production.
What Is Bridgeless JSI Synchronous Calls & Fabric Concurrent Renderer & Why Industry Teams Use ItIn React Native Training, Bridgeless JSI Synchronous Calls & Fabric Concurrent Renderer exists for one clear real-world purpose: Understand why modern React Native achieves native-grade startup and gesture latency. Even if you come from a non-technical background, we start with the everyday real-life problem f...
Hands-On Implementation: Bridgeless JSI Synchronous Calls & Fabric Concurrent Renderer
Build and verify a clean working module demonstrating Bridgeless JSI Synchronous Calls & Fabric Concurrent Renderer (Understand why modern React Native achieves native-grade startup and gesture latenc...
Live Lab Sprint: Bridgeless JSI Synchronous Calls & Fabric Concurrent Renderer
// Bridgeless JSI Synchronous Calls & Fabric Concurrent Renderer
// Purpose: Understand why modern React Native achieves native-grade startup and gesture latency.
export function bridgeless_j_s_i_synchronous(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) throw new Error('Invalid input');
return { verified: true, keys: Object.keys(input).length };
}Route WhatsApp/SMS links directly to authenticated product or order screens.
💡 Self-Explanatory Overview: In simple, everyday terms, Typed React Navigation Stacks, Tabs, Modals & Universal Deep Links teaches you how React Native applications route WhatsApp/SMS links directly to authenticated product or order screens. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply Typed React Navigation Stacks, Tabs, Modals & Universal Deep Links in real React Native systems — specifically: Route WhatsApp/SMS links directly to authenticated product or order screens, so your code stays reliable, fast, and easy to maintain in production.
What Is Typed React Navigation Stacks, Tabs, Modals & Universal Deep Links & Why Industry Teams Use ItIn React Native Training, Typed React Navigation Stacks, Tabs, Modals & Universal Deep Links exists for one clear real-world purpose: Route WhatsApp/SMS links directly to authenticated product or order screens. Even if you come from a non-technical background, we start with the everyday real-life problem...
Hands-On Implementation: Typed React Navigation Stacks, Tabs, Modals & Universal Deep Links
Build and verify a clean working module demonstrating Typed React Navigation Stacks, Tabs, Modals & Universal Deep Links (Route WhatsApp/SMS links directly to authenticated product or order screens.)....
Live Lab Sprint: Typed React Navigation Stacks, Tabs, Modals & Universal Deep Links
// Typed React Navigation Stacks, Tabs, Modals & Universal Deep Links
// Purpose: Route WhatsApp/SMS links directly to authenticated product or order screens.
export function typed_react_navigation(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) throw new Error('Invalid input');
return { verified: true, keys: Object.keys(input).length };
}Read cached mobile state 30x faster than legacy AsyncStorage on app launch.
💡 Self-Explanatory Overview: In simple, everyday terms, TanStack Query + Zustand + MMKV Synchronous Persistence teaches you how React Native applications read cached mobile state 30x faster than legacy AsyncStorage on app launch. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply TanStack Query + Zustand + MMKV Synchronous Persistence in real React Native systems — specifically: Read cached mobile state 30x faster than legacy AsyncStorage on app launch, so your code stays reliable, fast, and easy to maintain in production.
What Is TanStack Query + Zustand + MMKV Synchronous Persistence & Why Industry Teams Use ItIn React Native Training, TanStack Query + Zustand + MMKV Synchronous Persistence exists for one clear real-world purpose: Read cached mobile state 30x faster than legacy AsyncStorage on app launch. Even if you come from a non-technical background, we start with the everyday real-life problem first before writing production...
Hands-On Implementation: TanStack Query + Zustand + MMKV Synchronous Persistence
Build and verify a clean working module demonstrating TanStack Query + Zustand + MMKV Synchronous Persistence (Read cached mobile state 30x faster than legacy AsyncStorage on app launch.). Handle inva...
Live Lab Sprint: TanStack Query + Zustand + MMKV Synchronous Persistence
// TanStack Query + Zustand + MMKV Synchronous Persistence
// Purpose: Read cached mobile state 30x faster than legacy AsyncStorage on app launch.
export function tan_stack_query_zustand(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) throw new Error('Invalid input');
return { verified: true, keys: Object.keys(input).length };
}Prevent notches and on-screen keyboards from covering input fields across devices.
💡 Self-Explanatory Overview: In simple, everyday terms, KeyboardAvoiding Patterns, SafeAreaInsets & Responsive Breakpoints teaches you how React Native applications prevent notches and on-screen keyboards from covering input fields across devices. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply KeyboardAvoiding Patterns, SafeAreaInsets & Responsive Breakpoints in real React Native systems — specifically: Prevent notches and on-screen keyboards from covering input fields across devices, so your code stays reliable, fast, and easy to maintain in production.
What Is KeyboardAvoiding Patterns, SafeAreaInsets & Responsive Breakpoints & Why Industry Teams Use ItIn React Native Training, KeyboardAvoiding Patterns, SafeAreaInsets & Responsive Breakpoints exists for one clear real-world purpose: Prevent notches and on-screen keyboards from covering input fields across devices. Even if you come from a non-technical background, we start with the everyday real-life pr...
Hands-On Implementation: KeyboardAvoiding Patterns, SafeAreaInsets & Responsive Breakpoints
Build and verify a clean working module demonstrating KeyboardAvoiding Patterns, SafeAreaInsets & Responsive Breakpoints (Prevent notches and on-screen keyboards from covering input fields across devi...
Live Lab Sprint: KeyboardAvoiding Patterns, SafeAreaInsets & Responsive Breakpoints
// KeyboardAvoiding Patterns, SafeAreaInsets & Responsive Breakpoints
// Purpose: Prevent notches and on-screen keyboards from covering input fields across devices.
export function keyboard_avoiding_patterns_safe_area_insets(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) throw new Error('Invalid input');
return { verified: true, keys: Object.keys(input).length };
}Design, implement, test, and document 'Type-Safe Deep-Linked Mobile Commerce Shell' applying every production concept from Module 11 (React Native New Architecture (Fabric, JSI, TurboModules) & Navigation) of React Native Training.
Module Learning & Hands-On Objectives
Eliminate blank white cells while flick-scrolling thousands of catalog cards.
💡 Self-Explanatory Overview: In simple, everyday terms, Cell Recycling with FlashList vs FlatList Memory Spikes teaches you how React Native applications eliminate blank white cells while flick-scrolling thousands of catalog cards. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply Cell Recycling with FlashList vs FlatList Memory Spikes in real React Native systems — specifically: Eliminate blank white cells while flick-scrolling thousands of catalog cards, so your code stays reliable, fast, and easy to maintain in production.
What Is Cell Recycling with FlashList vs FlatList Memory Spikes & Why Industry Teams Use ItIn React Native Training, Cell Recycling with FlashList vs FlatList Memory Spikes exists for one clear real-world purpose: Eliminate blank white cells while flick-scrolling thousands of catalog cards. Even if you come from a non-technical background, we start with the everyday real-life problem first before writing producti...
Hands-On Implementation: Cell Recycling with FlashList vs FlatList Memory Spikes
Build and verify a clean working module demonstrating Cell Recycling with FlashList vs FlatList Memory Spikes (Eliminate blank white cells while flick-scrolling thousands of catalog cards.). Handle in...
Live Lab Sprint: Cell Recycling with FlashList vs FlatList Memory Spikes
// Cell Recycling with FlashList vs FlatList Memory Spikes
// Purpose: Eliminate blank white cells while flick-scrolling thousands of catalog cards.
export function cell_recycling_with(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) throw new Error('Invalid input');
return { verified: true, keys: Object.keys(input).length };
}Run buttery 60/120fps swipe-to-pay and bottom-sheet animations even when JS is busy.
💡 Self-Explanatory Overview: In simple, everyday terms, Reanimated Worklets & Gesture Handler on the Native UI Thread teaches you how React Native applications run buttery 60/120fps swipe-to-pay and bottom-sheet animations even when JS is busy. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply Reanimated Worklets & Gesture Handler on the Native UI Thread in real React Native systems — specifically: Run buttery 60/120fps swipe-to-pay and bottom-sheet animations even when JS is busy, so your code stays reliable, fast, and easy to maintain in production.
What Is Reanimated Worklets & Gesture Handler on the Native UI Thread & Why Industry Teams Use ItIn React Native Training, Reanimated Worklets & Gesture Handler on the Native UI Thread exists for one clear real-world purpose: Run buttery 60/120fps swipe-to-pay and bottom-sheet animations even when JS is busy. Even if you come from a non-technical background, we start with the everyday real-life problem fi...
Hands-On Implementation: Reanimated Worklets & Gesture Handler on the Native UI Thread
Build and verify a clean working module demonstrating Reanimated Worklets & Gesture Handler on the Native UI Thread (Run buttery 60/120fps swipe-to-pay and bottom-sheet animations even when JS is busy...
Live Lab Sprint: Reanimated Worklets & Gesture Handler on the Native UI Thread
// Reanimated Worklets & Gesture Handler on the Native UI Thread
// Purpose: Run buttery 60/120fps swipe-to-pay and bottom-sheet animations even when JS is busy.
export function reanimated_worklets_gesture(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) throw new Error('Invalid input');
return { verified: true, keys: Object.keys(input).length };
}Queue field updates offline and replay idempotently once 4G/Wi-Fi returns.
💡 Self-Explanatory Overview: In simple, everyday terms, NetInfo Connectivity Queues & SQLite/WatermelonDB Offline Storage teaches you how React Native applications queue field updates offline and replay idempotently once 4G/Wi-Fi returns. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply NetInfo Connectivity Queues & SQLite/WatermelonDB Offline Storage in real React Native systems — specifically: Queue field updates offline and replay idempotently once 4G/Wi-Fi returns, so your code stays reliable, fast, and easy to maintain in production.
What Is NetInfo Connectivity Queues & SQLite/WatermelonDB Offline Storage & Why Industry Teams Use ItIn React Native Training, NetInfo Connectivity Queues & SQLite/WatermelonDB Offline Storage exists for one clear real-world purpose: Queue field updates offline and replay idempotently once 4G/Wi-Fi returns. Even if you come from a non-technical background, we start with the everyday real-life problem firs...
Hands-On Implementation: NetInfo Connectivity Queues & SQLite/WatermelonDB Offline Storage
Build and verify a clean working module demonstrating NetInfo Connectivity Queues & SQLite/WatermelonDB Offline Storage (Queue field updates offline and replay idempotently once 4G/Wi-Fi returns.). Ha...
Live Lab Sprint: NetInfo Connectivity Queues & SQLite/WatermelonDB Offline Storage
// NetInfo Connectivity Queues & SQLite/WatermelonDB Offline Storage
// Purpose: Queue field updates offline and replay idempotently once 4G/Wi-Fi returns.
export function net_info_connectivity_queues(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) throw new Error('Invalid input');
return { verified: true, keys: Object.keys(input).length };
}Harden mobile sessions and sensitive healthcare/fintech payloads on device.
💡 Self-Explanatory Overview: In simple, everyday terms, Expo SecureStore, Biometric Auth & SSL Pinning teaches you how React Native applications harden mobile sessions and sensitive healthcare/fintech payloads on device. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply Expo SecureStore, Biometric Auth & SSL Pinning in real React Native systems — specifically: Harden mobile sessions and sensitive healthcare/fintech payloads on device, so your code stays reliable, fast, and easy to maintain in production.
What Is Expo SecureStore, Biometric Auth & SSL Pinning & Why Industry Teams Use ItIn React Native Training, Expo SecureStore, Biometric Auth & SSL Pinning exists for one clear real-world purpose: Harden mobile sessions and sensitive healthcare/fintech payloads on device. Even if you come from a non-technical background, we start with the everyday real-life problem first before writing production syntax.Su...
Hands-On Implementation: Expo SecureStore, Biometric Auth & SSL Pinning
Build and verify a clean working module demonstrating Expo SecureStore, Biometric Auth & SSL Pinning (Harden mobile sessions and sensitive healthcare/fintech payloads on device.). Handle invalid input...
Live Lab Sprint: Expo SecureStore, Biometric Auth & SSL Pinning
// Expo SecureStore, Biometric Auth & SSL Pinning
// Purpose: Harden mobile sessions and sensitive healthcare/fintech payloads on device.
export function expo_secure_store_biometric(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) throw new Error('Invalid input');
return { verified: true, keys: Object.keys(input).length };
}Design, implement, test, and document 'Fluid Gesture-Driven Feed & Offline Order Sync App' applying every production concept from Module 12 (60fps Lists (FlashList), Reanimated UI-Thread Gestures & Offline Sync) of React Native Training.
Module Learning & Hands-On Objectives
Explain permission value upfront to maximize user opt-in and pass App Store review.
💡 Self-Explanatory Overview: In simple, everyday terms, Graceful Runtime Permission Flows (Camera, Location, Notifications) teaches you how React Native applications explain permission value upfront to maximize user opt-in and pass App Store review. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply Graceful Runtime Permission Flows (Camera, Location, Notifications) in real React Native systems — specifically: Explain permission value upfront to maximize user opt-in and pass App Store review, so your code stays reliable, fast, and easy to maintain in production.
What Is Graceful Runtime Permission Flows (Camera, Location, Notifications) & Why Industry Teams Use ItIn React Native Training, Graceful Runtime Permission Flows (Camera, Location, Notifications) exists for one clear real-world purpose: Explain permission value upfront to maximize user opt-in and pass App Store review. Even if you come from a non-technical background, we start with the everyday real-life problem...
Hands-On Implementation: Graceful Runtime Permission Flows (Camera, Location, Notifications)
Build and verify a clean working module demonstrating Graceful Runtime Permission Flows (Camera, Location, Notifications) (Explain permission value upfront to maximize user opt-in and pass App Store r...
Live Lab Sprint: Graceful Runtime Permission Flows (Camera, Location, Notifications)
// Graceful Runtime Permission Flows (Camera, Location, Notifications)
// Purpose: Explain permission value upfront to maximize user opt-in and pass App Store review.
export function graceful_runtime_permission(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) throw new Error('Invalid input');
return { verified: true, keys: Object.keys(input).length };
}Upload compressed receipts and photos reliably over flaky mobile networks.
💡 Self-Explanatory Overview: In simple, everyday terms, Chunked/Presigned Multipart Media Uploads & Image Compression teaches you how React Native applications upload compressed receipts and photos reliably over flaky mobile networks. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply Chunked/Presigned Multipart Media Uploads & Image Compression in real React Native systems — specifically: Upload compressed receipts and photos reliably over flaky mobile networks, so your code stays reliable, fast, and easy to maintain in production.
What Is Chunked/Presigned Multipart Media Uploads & Image Compression & Why Industry Teams Use ItIn React Native Training, Chunked/Presigned Multipart Media Uploads & Image Compression exists for one clear real-world purpose: Upload compressed receipts and photos reliably over flaky mobile networks. Even if you come from a non-technical background, we start with the everyday real-life problem first before...
Hands-On Implementation: Chunked/Presigned Multipart Media Uploads & Image Compression
Build and verify a clean working module demonstrating Chunked/Presigned Multipart Media Uploads & Image Compression (Upload compressed receipts and photos reliably over flaky mobile networks.). Handle...
Live Lab Sprint: Chunked/Presigned Multipart Media Uploads & Image Compression
// Chunked/Presigned Multipart Media Uploads & Image Compression
// Purpose: Upload compressed receipts and photos reliably over flaky mobile networks.
export function chunked_presigned_multipart_media(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) throw new Error('Invalid input');
return { verified: true, keys: Object.keys(input).length };
}Re-engage users reliably across foreground, background, and cold-killed app states.
💡 Self-Explanatory Overview: In simple, everyday terms, FCM / APNs Push Notification Channels, Badges & Background Tap Routing teaches you how React Native applications re-engage users reliably across foreground, background, and cold-killed app states. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply FCM / APNs Push Notification Channels, Badges & Background Tap Routing in real React Native systems — specifically: Re-engage users reliably across foreground, background, and cold-killed app states, so your code stays reliable, fast, and easy to maintain in production.
What Is FCM / APNs Push Notification Channels, Badges & Background Tap Routing & Why Industry Teams Use ItIn React Native Training, FCM / APNs Push Notification Channels, Badges & Background Tap Routing exists for one clear real-world purpose: Re-engage users reliably across foreground, background, and cold-killed app states. Even if you come from a non-technical background, we start with the everyday rea...
Hands-On Implementation: FCM / APNs Push Notification Channels, Badges & Background Tap Routing
Build and verify a clean working module demonstrating FCM / APNs Push Notification Channels, Badges & Background Tap Routing (Re-engage users reliably across foreground, background, and cold-killed ap...
Live Lab Sprint: FCM / APNs Push Notification Channels, Badges & Background Tap Routing
// FCM / APNs Push Notification Channels, Badges & Background Tap Routing
// Purpose: Re-engage users reliably across foreground, background, and cold-killed app states.
export function f_c_m_a_p_ns_push(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) throw new Error('Invalid input');
return { verified: true, keys: Object.keys(input).length };
}Customize native Gradle/Podfile capabilities cleanly without losing upgrade velocity.
💡 Self-Explanatory Overview: In simple, everyday terms, Expo Config Plugins & Custom Native Android/iOS Manifest Tuning teaches you how React Native applications customize native Gradle/Podfile capabilities cleanly without losing upgrade velocity. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply Expo Config Plugins & Custom Native Android/iOS Manifest Tuning in real React Native systems — specifically: Customize native Gradle/Podfile capabilities cleanly without losing upgrade velocity, so your code stays reliable, fast, and easy to maintain in production.
What Is Expo Config Plugins & Custom Native Android/iOS Manifest Tuning & Why Industry Teams Use ItIn React Native Training, Expo Config Plugins & Custom Native Android/iOS Manifest Tuning exists for one clear real-world purpose: Customize native Gradle/Podfile capabilities cleanly without losing upgrade velocity. Even if you come from a non-technical background, we start with the everyday real-life probl...
Hands-On Implementation: Expo Config Plugins & Custom Native Android/iOS Manifest Tuning
Build and verify a clean working module demonstrating Expo Config Plugins & Custom Native Android/iOS Manifest Tuning (Customize native Gradle/Podfile capabilities cleanly without losing upgrade veloc...
Live Lab Sprint: Expo Config Plugins & Custom Native Android/iOS Manifest Tuning
// Expo Config Plugins & Custom Native Android/iOS Manifest Tuning
// Purpose: Customize native Gradle/Podfile capabilities cleanly without losing upgrade velocity.
export function expo_config_plugins(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) throw new Error('Invalid input');
return { verified: true, keys: Object.keys(input).length };
}Design, implement, test, and document 'Media Capture, Push Alert & Native Payment Integration' applying every production concept from Module 13 (Native Permissions, Camera/Media Uploads, Push & Native Module Config) of React Native Training.
Module Learning & Hands-On Objectives
Test mobile screens via accessibility labels and user events cleanly.
💡 Self-Explanatory Overview: In simple, everyday terms, Component Specs with Jest & React Native Testing Library teaches you how React Native applications test mobile screens via accessibility labels and user events cleanly. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply Component Specs with Jest & React Native Testing Library in real React Native systems — specifically: Test mobile screens via accessibility labels and user events cleanly, so your code stays reliable, fast, and easy to maintain in production.
What Is Component Specs with Jest & React Native Testing Library & Why Industry Teams Use ItIn React Native Training, Component Specs with Jest & React Native Testing Library exists for one clear real-world purpose: Test mobile screens via accessibility labels and user events cleanly. Even if you come from a non-technical background, we start with the everyday real-life problem first before writing produc...
Hands-On Implementation: Component Specs with Jest & React Native Testing Library
Build and verify a clean working module demonstrating Component Specs with Jest & React Native Testing Library (Test mobile screens via accessibility labels and user events cleanly.). Handle invalid i...
Live Lab Sprint: Component Specs with Jest & React Native Testing Library
// Component Specs with Jest & React Native Testing Library
// Purpose: Test mobile screens via accessibility labels and user events cleanly.
export function component_specs_with(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) throw new Error('Invalid input');
return { verified: true, keys: Object.keys(input).length };
}Verify login, OTP, and cart checkout automatically on iOS Simulator & Android Emulator.
💡 Self-Explanatory Overview: In simple, everyday terms, Black-Box Mobile E2E Flows with Maestro / Detox teaches you how React Native applications verify login, OTP, and cart checkout automatically on iOS Simulator & Android Emulator. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply Black-Box Mobile E2E Flows with Maestro / Detox in real React Native systems — specifically: Verify login, OTP, and cart checkout automatically on iOS Simulator & Android Emulator, so your code stays reliable, fast, and easy to maintain in production.
What Is Black-Box Mobile E2E Flows with Maestro / Detox & Why Industry Teams Use ItIn React Native Training, Black-Box Mobile E2E Flows with Maestro / Detox exists for one clear real-world purpose: Verify login, OTP, and cart checkout automatically on iOS Simulator & Android Emulator. Even if you come from a non-technical background, we start with the everyday real-life problem first before writing production...
Hands-On Implementation: Black-Box Mobile E2E Flows with Maestro / Detox
Build and verify a clean working module demonstrating Black-Box Mobile E2E Flows with Maestro / Detox (Verify login, OTP, and cart checkout automatically on iOS Simulator & Android Emulator.). Handle...
Live Lab Sprint: Black-Box Mobile E2E Flows with Maestro / Detox
// Black-Box Mobile E2E Flows with Maestro / Detox
// Purpose: Verify login, OTP, and cart checkout automatically on iOS Simulator & Android Emulator.
export function black_box_mobile_e2_e(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) throw new Error('Invalid input');
return { verified: true, keys: Object.keys(input).length };
}Slash Time-to-Interactive (TTI) and debug native + JS crashes from one console.
💡 Self-Explanatory Overview: In simple, everyday terms, Hermes Bytecode Startup Profiling, Bundle Size & Sentry Crash Sourcemaps teaches you how React Native applications slash Time-to-Interactive (TTI) and debug native + JS crashes from one console. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply Hermes Bytecode Startup Profiling, Bundle Size & Sentry Crash Sourcemaps in real React Native systems — specifically: Slash Time-to-Interactive (TTI) and debug native + JS crashes from one console, so your code stays reliable, fast, and easy to maintain in production.
What Is Hermes Bytecode Startup Profiling, Bundle Size & Sentry Crash Sourcemaps & Why Industry Teams Use ItIn React Native Training, Hermes Bytecode Startup Profiling, Bundle Size & Sentry Crash Sourcemaps exists for one clear real-world purpose: Slash Time-to-Interactive (TTI) and debug native + JS crashes from one console. Even if you come from a non-technical background, we start with the everyday rea...
Hands-On Implementation: Hermes Bytecode Startup Profiling, Bundle Size & Sentry Crash Sourcemaps
Build and verify a clean working module demonstrating Hermes Bytecode Startup Profiling, Bundle Size & Sentry Crash Sourcemaps (Slash Time-to-Interactive (TTI) and debug native + JS crashes from one c...
Live Lab Sprint: Hermes Bytecode Startup Profiling, Bundle Size & Sentry Crash Sourcemaps
// Hermes Bytecode Startup Profiling, Bundle Size & Sentry Crash Sourcemaps
// Purpose: Slash Time-to-Interactive (TTI) and debug native + JS crashes from one console.
export function hermes_bytecode_startup(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) throw new Error('Invalid input');
return { verified: true, keys: Object.keys(input).length };
}Ship critical JS bugfixes to users in minutes while respecting native runtime compatibility.
💡 Self-Explanatory Overview: In simple, everyday terms, EAS Build Profiles, Store Submissions & Safe Over-the-Air (OTA) Updates teaches you how React Native applications ship critical JS bugfixes to users in minutes while respecting native runtime compatibility. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply EAS Build Profiles, Store Submissions & Safe Over-the-Air (OTA) Updates in real React Native systems — specifically: Ship critical JS bugfixes to users in minutes while respecting native runtime compatibility, so your code stays reliable, fast, and easy to maintain in production.
What Is EAS Build Profiles, Store Submissions & Safe Over-the-Air (OTA) Updates & Why Industry Teams Use ItIn React Native Training, EAS Build Profiles, Store Submissions & Safe Over-the-Air (OTA) Updates exists for one clear real-world purpose: Ship critical JS bugfixes to users in minutes while respecting native runtime compatibility. Even if you come from a non-technical background, we start with the e...
Hands-On Implementation: EAS Build Profiles, Store Submissions & Safe Over-the-Air (OTA) Updates
Build and verify a clean working module demonstrating EAS Build Profiles, Store Submissions & Safe Over-the-Air (OTA) Updates (Ship critical JS bugfixes to users in minutes while respecting native run...
Live Lab Sprint: EAS Build Profiles, Store Submissions & Safe Over-the-Air (OTA) Updates
// EAS Build Profiles, Store Submissions & Safe Over-the-Air (OTA) Updates
// Purpose: Ship critical JS bugfixes to users in minutes while respecting native runtime compatibility.
export function e_a_s_build_profiles(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) throw new Error('Invalid input');
return { verified: true, keys: Object.keys(input).length };
}Design, implement, test, and document 'Production Hermes Bundle with Maestro E2E & Instant OTA' applying every production concept from Module 14 (RNTL + Maestro E2E Testing, Hermes Profiling, Sentry & EAS OTA Releases) of React Native Training.
Module Learning & Hands-On Objectives
Understand how direct C++ JSI bindings replace legacy JSON bridge bottlenecks for native speed
💡 Self-Explanatory Overview: In simple, everyday terms, React Native New Architecture: JSI, Fabric Synchronous Layout & TurboModules teaches you how React Native applications understand how direct C++ JSI bindings replace legacy JSON bridge bottlenecks for native speed. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply React Native New Architecture: JSI, Fabric Synchronous Layout & TurboModules in real React Native systems — specifically: Understand how direct C++ JSI bindings replace legacy JSON bridge bottlenecks for native speed, so your code stays reliable, fast, and easy to maintain in production.
Detailed Topic Mastery Guide: 15.1 — React Native New Architecture: JSI, Fabric Synchronous Layout & TurboModules (Stage 4: Production Architecture, Testing, CI/CD & Expert Mastery)In simple, everyday terms, React Native New Architecture: JSI, Fabric Synchronous Layout & TurboModules teaches you how React Native applications understand how direct C++ JSI bindings replace legacy JSON bridge bottlenecks for...
Practical Implementation: React Native New Architecture: JSI, Fabric Synchronous Layout & TurboModules
Implement and verify React Native New Architecture: JSI, Fabric Synchronous Layout & TurboModules (Understand how direct C++ JSI bindings replace legacy JSON bridge bottlenecks for native speed) with...
Guided Live Lab Checklist: React Native New Architecture: JSI, Fabric Synchronous Layout & TurboModules
// React Native New Architecture: JSI, Fabric Synchronous Layout & TurboModules
// Purpose: Understand how direct C++ JSI bindings replace legacy JSON bridge bottlenecks for native speed
export function react_native_new(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) {
throw new Error('Validated payload required');
}
return { topic: 'React Native New Architecture: JSI, Fabric Synchronous Layout & TurboModules', ok: true, checkedAt: new Date().toISOString() };
}Build silky-smooth mobile feeds, bottom sheets, and chat screens on budget Android & iOS devices
💡 Self-Explanatory Overview: In simple, everyday terms, High-Speed Lists (FlashList), UI-Thread Gestures (Reanimated) & Keyboard Handling teaches you how React Native applications build silky-smooth mobile feeds, bottom sheets, and chat screens on budget Android & iOS devices. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply High-Speed Lists (FlashList), UI-Thread Gestures (Reanimated) & Keyboard Handling in real React Native systems — specifically: Build silky-smooth mobile feeds, bottom sheets, and chat screens on budget Android & iOS devices, so your code stays reliable, fast, and easy to maintain in production.
Detailed Topic Mastery Guide: 15.2 — High-Speed Lists (FlashList), UI-Thread Gestures (Reanimated) & Keyboard Handling (Stage 4: Production Architecture, Testing, CI/CD & Expert Mastery)In simple, everyday terms, High-Speed Lists (FlashList), UI-Thread Gestures (Reanimated) & Keyboard Handling teaches you how React Native applications build silky-smooth mobile feeds, bottom sheets, and chat screens on bud...
Practical Implementation: High-Speed Lists (FlashList), UI-Thread Gestures (Reanimated) & Keyboard Handling
Implement and verify High-Speed Lists (FlashList), UI-Thread Gestures (Reanimated) & Keyboard Handling (Build silky-smooth mobile feeds, bottom sheets, and chat screens on budget Android & iOS devices...
Guided Live Lab Checklist: High-Speed Lists (FlashList), UI-Thread Gestures (Reanimated) & Keyboard Handling
// High-Speed Lists (FlashList), UI-Thread Gestures (Reanimated) & Keyboard Handling
// Purpose: Build silky-smooth mobile feeds, bottom sheets, and chat screens on budget Android & iOS devices
export function high_speed_lists_flash_list(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) {
throw new Error('Validated payload required');
}
return { topic: 'High-Speed Lists (FlashList), UI-Thread Gestures (Reanimated) & Keyboard Handling', ok: true, checkedAt: new Date().toISOSt...Persist mutations across offline periods and protect sensitive credentials in Keychain/Keystore
💡 Self-Explanatory Overview: In simple, everyday terms, Offline Queueing, MMKV/SecureStore Token Safety & Universal Deep Linking teaches you how React Native applications persist mutations across offline periods and protect sensitive credentials in Keychain/Keystore. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply Offline Queueing, MMKV/SecureStore Token Safety & Universal Deep Linking in real React Native systems — specifically: Persist mutations across offline periods and protect sensitive credentials in Keychain/Keystore, so your code stays reliable, fast, and easy to maintain in production.
Detailed Topic Mastery Guide: 15.3 — Offline Queueing, MMKV/SecureStore Token Safety & Universal Deep Linking (Stage 4: Production Architecture, Testing, CI/CD & Expert Mastery)In simple, everyday terms, Offline Queueing, MMKV/SecureStore Token Safety & Universal Deep Linking teaches you how React Native applications persist mutations across offline periods and protect sensitive credentials in Keychain/Ke...
Practical Implementation: Offline Queueing, MMKV/SecureStore Token Safety & Universal Deep Linking
Implement and verify Offline Queueing, MMKV/SecureStore Token Safety & Universal Deep Linking (Persist mutations across offline periods and protect sensitive credentials in Keychain/Keystore) with exp...
Guided Live Lab Checklist: Offline Queueing, MMKV/SecureStore Token Safety & Universal Deep Linking
// Offline Queueing, MMKV/SecureStore Token Safety & Universal Deep Linking
// Purpose: Persist mutations across offline periods and protect sensitive credentials in Keychain/Keystore
export function offline_queueing_m_m_k_v_secure_store(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) {
throw new Error('Validated payload required');
}
return { topic: 'Offline Queueing, MMKV/SecureStore Token Safety & Universal Deep Linking', ok: true, checkedAt: new Date().toISOString() };...Architect, implement, test, and document '60fps Gesture-Driven Offline-First React Native App with MMKV & FlashList' applying every bullet-wise engineering concept from Module 15 (React Native New Architecture (JSI/Fabric), Reanimated & Offline Sync) of React Native Training.
Module Learning & Hands-On Objectives
Cut cold TTI startup times and keep navigation transitions responsive under heavy state updates
💡 Self-Explanatory Overview: In simple, everyday terms, Hermes Bytecode Startup Tuning, Image Caching & Eliminating JS-Thread Frame Drops teaches you how React Native applications cut cold TTI startup times and keep navigation transitions responsive under heavy state updates. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply Hermes Bytecode Startup Tuning, Image Caching & Eliminating JS-Thread Frame Drops in real React Native systems — specifically: Cut cold TTI startup times and keep navigation transitions responsive under heavy state updates, so your code stays reliable, fast, and easy to maintain in production.
Detailed Topic Mastery Guide: 16.1 — Hermes Bytecode Startup Tuning, Image Caching & Eliminating JS-Thread Frame Drops (Stage 4: Production Architecture, Testing, CI/CD & Expert Mastery)In simple, everyday terms, Hermes Bytecode Startup Tuning, Image Caching & Eliminating JS-Thread Frame Drops teaches you how React Native applications cut cold TTI startup times and keep navigation transitions responsive u...
Practical Implementation: Hermes Bytecode Startup Tuning, Image Caching & Eliminating JS-Thread Frame Drops
Implement and verify Hermes Bytecode Startup Tuning, Image Caching & Eliminating JS-Thread Frame Drops (Cut cold TTI startup times and keep navigation transitions responsive under heavy state updates)...
Guided Live Lab Checklist: Hermes Bytecode Startup Tuning, Image Caching & Eliminating JS-Thread Frame Drops
// Hermes Bytecode Startup Tuning, Image Caching & Eliminating JS-Thread Frame Drops
// Purpose: Cut cold TTI startup times and keep navigation transitions responsive under heavy state updates
export function hermes_bytecode_startup(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) {
throw new Error('Validated payload required');
}
return { topic: 'Hermes Bytecode Startup Tuning, Image Caching & Eliminating JS-Thread Frame Drops', ok: true, checkedAt: new Date().toISOString(...Verify login, checkout, and offline recovery journeys automatically before store submission
💡 Self-Explanatory Overview: In simple, everyday terms, Component Testing with React Native Testing Library & Automated E2E Mobile Flows teaches you how React Native applications verify login, checkout, and offline recovery journeys automatically before store submission. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply Component Testing with React Native Testing Library & Automated E2E Mobile Flows in real React Native systems — specifically: Verify login, checkout, and offline recovery journeys automatically before store submission, so your code stays reliable, fast, and easy to maintain in production.
Detailed Topic Mastery Guide: 16.2 — Component Testing with React Native Testing Library & Automated E2E Mobile Flows (Stage 4: Production Architecture, Testing, CI/CD & Expert Mastery)In simple, everyday terms, Component Testing with React Native Testing Library & Automated E2E Mobile Flows teaches you how React Native applications verify login, checkout, and offline recovery journeys automatically befor...
Practical Implementation: Component Testing with React Native Testing Library & Automated E2E Mobile Flows
Implement and verify Component Testing with React Native Testing Library & Automated E2E Mobile Flows (Verify login, checkout, and offline recovery journeys automatically before store submission) with...
Guided Live Lab Checklist: Component Testing with React Native Testing Library & Automated E2E Mobile Flows
// Component Testing with React Native Testing Library & Automated E2E Mobile Flows
// Purpose: Verify login, checkout, and offline recovery journeys automatically before store submission
export function component_testing_with(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) {
throw new Error('Validated payload required');
}
return { topic: 'Component Testing with React Native Testing Library & Automated E2E Mobile Flows', ok: true, checkedAt: new Date().toISOString() };
}Navigate native permissions, push notifications, and crash triage in React Native interviews
💡 Self-Explanatory Overview: In simple, everyday terms, App Store / Play Store Signing, OTA Update Rules & Mobile System Design Interviews teaches you how React Native applications navigate native permissions, push notifications, and crash triage in React Native interviews. Even if you have never seen this concept before, your trainer explains the real-life problem first, writes clean React Native 0.76+ (New Architecture), Hermes Engine, JSI, Fabric & TurboModules, Expo SDK 52, Expo Router & EAS Build code live on screen, and shows what breaks in production if this step is skipped.
🎯 For What Purpose: To understand and apply App Store / Play Store Signing, OTA Update Rules & Mobile System Design Interviews in real React Native systems — specifically: Navigate native permissions, push notifications, and crash triage in React Native interviews, so your code stays reliable, fast, and easy to maintain in production.
Detailed Topic Mastery Guide: 16.3 — App Store / Play Store Signing, OTA Update Rules & Mobile System Design Interviews (Stage 4: Production Architecture, Testing, CI/CD & Expert Mastery)In simple, everyday terms, App Store / Play Store Signing, OTA Update Rules & Mobile System Design Interviews teaches you how React Native applications navigate native permissions, push notifications, and crash triage in...
Practical Implementation: App Store / Play Store Signing, OTA Update Rules & Mobile System Design Interviews
Implement and verify App Store / Play Store Signing, OTA Update Rules & Mobile System Design Interviews (Navigate native permissions, push notifications, and crash triage in React Native interviews) w...
Guided Live Lab Checklist: App Store / Play Store Signing, OTA Update Rules & Mobile System Design Interviews
// App Store / Play Store Signing, OTA Update Rules & Mobile System Design Interviews
// Purpose: Navigate native permissions, push notifications, and crash triage in React Native interviews
export function app_store_play(input: Record<string, unknown>) {
if (!input || Object.keys(input).length === 0) {
throw new Error('Validated payload required');
}
return { topic: 'App Store / Play Store Signing, OTA Update Rules & Mobile System Design Interviews', ok: true, checkedAt: new Date().toISOString() };
}Architect, implement, test, and document 'Hermes Bundle Audit, Jest + Maestro/Detox Test Flow & Signed Release Pipeline' applying every bullet-wise engineering concept from Module 16 (React Native Performance Profiling, E2E Testing & EAS App Store Delivery) of React Native Training.
JavaScript ES6+
Web Language
TypeScript 5
Typed Language
React Native New Arch (JSI)
Frontend UI
Expo SDK & Router
iOS & Android
MMKV & Offline SQLite Sync
Relational Queries
Push Notifications & Auth
Realtime & Push
60fps Reanimated & Profiling
Web Performance
EAS Build & OTA Releases
CI/CD Pipelines
LeetCode Problem Solving
Trainer Coding Prep
HackerRank Coding Prep
Trainer Coding PrepReact Native (by Meta) lets engineers build real native iOS and Android mobile apps using JavaScript, TypeScript, and React — powering apps at Microsoft, Shopify, Discord, and Flipkart.
Approachable for beginners starting mobile engineering and an effortless superpower for web/React learners.
Key Engineering Capabilities You Will Build:
Purpose: Render genuine native iOS UIKit and Android Views — never sluggish mobile webviews.
Purpose: Communicate synchronously between JS and native C++/Kotlin/Swift for 60 FPS animations.
Purpose: Scroll thousands of e-commerce products and swipe gestures with zero dropped frames.
Purpose: Deliver native screen transitions and open exact screens from SMS, email, or push alerts.
Taught live by active Working IT Professionals between 7:00 AM and 8:00 PM IST (choose any slot based on trainer availability).
Weekdays (Mon – Fri): 1 Hour / Day • 7:00 AM to 8:00 PM IST (choose any slot based on trainer availability)
Weekends (Sat – Sun): 2 Hours / Day • 7:00 AM to 8:00 PM IST (choose any slot based on trainer availability)
React Native Training — Weekday Live Online Cohort (₹4,999 (Incl. 18% GST))
Mon - Fri (Weekday Live • 1 Hr/Day) • 07:00 AM - 08:00 PM IST (1 Hr/Day • Any Slot per Trainer Availability)
Starts: 10 Oct 2026
React Native Training — Weekend Live Online Cohort (₹4,999 (Incl. 18% GST))
Sat - Sun (Weekend Live • 2 Hrs/Day) • 07:00 AM - 08:00 PM IST (2 Hrs/Day • Any Slot per Trainer Availability)
Starts: 05 Nov 2026
LeetCode Support
HackerRank Support
Enrolled students receive live trainer mentorship to break down algorithmic/query patterns, edge cases, and optimal complexity so you can confidently crack LeetCode and HackerRank problems in JavaScript ES6+ & TypeScript.
🚀 Live Client Production Project + Internship Letter
After completing all 16 progressive hands-on module projects during live classes, students join our mentor-led Client Production Sprint to build, test, and deploy "RouteMate Real-Time Rider Delivery, Live Map & Order Wallet Mobile App" to live cloud production — earning an Official Verified Internship Letter detailing their exact technical contributions.
Domain: Last-Mile E-Commerce & Hyperlocal Mobility Client • Infra: React Native + Expo/CLI + TypeScript + Zustand/TanStack Query + Reanimated + OTA Releases
Certified on Your Official Internship Confirmation Letter:
See the exact job positions and realistic salary packages unlocked by React Native Training, plus which specialized MockAttempt Academy courses to pair next to qualify for higher-paying multi-stack engineering roles.
React Native New Architecture, Navigation, FlatList tuning, APIs & store-ready build.
TypeScript, Reanimated gestures, offline sync & native module troubleshooting.
Unlocked by pairing React Native with React.js Web, TypeScript, and Node.js!
Why Learn Next (For What Purpose): Share TypeScript hooks and state across Web, iOS, and Android from a monorepo.
Why Learn Next (For What Purpose): Own both the React Native mobile client and the Node.js + MongoDB backend APIs.
Why Learn Next (For What Purpose): Build custom TurboModules and native Android SDK bridges when apps need low-level hardware control.
MockAttempt Academy keeps production-grade React Native New Architecture (JSI/Fabric) & Expo training ultra-affordable at ₹3,799 (Incl. 18% GST) so every learner gets 10,440 MCQs, 16 Capstone Projects, Live Client Production deployment, and spoken MockAttempt AI interview coaching.
Regular Skill Courses offer both Weekday Live Batches (Monday–Friday, 1 Hour/Day between 7:00 AM and 8:00 PM IST) and Weekend Live Batches (Saturday–Sunday, 2 Hours/Day between 7:00 AM and 8:00 PM IST) taught 100% by active Working IT Professionals — students can choose any convenient slot based on trainer availability.
Instead of passive pre-recorded videos, you code live with senior architects, monitor 100% of syllabus progress transparently, build 16 progressive Module Projects during training, and deploy a real Live Client Project to production at the end of the course — earning both a Barcode Graduation Certificate and an Official Project Internship Confirmation Letter.
Across all 42 syllabus topics in 16 modules, this course includes 244 Timed Topic Mock Tests (10,440 curated MCQs with detailed explanations) and 244 Spoken Voice + MockAttempt AI Technical Interview rounds — ensuring 100% of topics are assessed.
The AI Interviewer speaks each question aloud via Text-to-Speech, listens via microphone Speech-to-Text, normalizes spoken technical syntax, and sends your transcript to the MockAttempt AI verification agent for scoring and follow-up probing.
All MockAttempt Tech Academy fees are 100% fixed and non-negotiable (₹4,999 (Incl. 18% GST)). We never inflate fake MRPs only to bargain discounts because we refuse to compromise on Senior Industry Expert trainers, small interactive live batches, real cloud/repository labs, daily assessments, or placement mentorship.
Yes! Because this curriculum includes JavaScript ES6+ & TypeScript, your trainer provides guided problem-solving support to break down patterns, edge cases, and optimal complexity so you can confidently crack LeetCode and HackerRank problems.
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