React Mastery

Contenido del Curso

React Mastery

React Mastery

1. Fundamentals of React and Component-Based UI

What Is React and Why Use It?Comparing SPAs and MPAs in Web Development How React Works with the Virtual DOM Introducing JSX for Writing HTML in JavaScript Building Complex UI with JSX Rendering Elements in React Challenge: Render an Element in React Understanding React Components Passing Data with Props in React Challenge: Create Functional Components Conditional Rendering in React Challenge: Implement Conditional Rendering – Chat Notification Challenge: Implement Conditional Rendering – Bank Alert Rendering Collections of Data in React Challenge: Display Data Collections in React React Fundamentals Wrap-Up

2. Styling Techniques in React Applications

Introduction to Styling in React Using Inline Styles in React Applying Inline Styles in Practice Challenge: Use Inline Styles in a React Component Styling React Components with External CSS Applying External CSS in Practice Challenge: Apply External CSS to a React App Using CSS Modules for Scoped Styling in React Organizing File and Folder Structures for Styles Challenge: Use CSS Modules in React Styling Techniques in React Wrap-Up

3. React Hooks and Context for State Management

Introduction to React Hooks and Context Managing State with the useState Hook Challenge: Toggle Visibility with useState Working with References Using the useRef Hook Challenge: Build a Controlled Form Component Handling Side Effects with the useEffect Hook Challenge: Fetch and Display Data with useEffect Optimizing Performance with the useMemo Hook Challenge: Implement a Car List Filter with useMemo Sharing State Across Components with Context Using Context in a Real-World Scenario Challenge: Build a World of Astronomy App with Context React Hooks and Context Wrap-Up

4. Structuring Real-World React Projects

Setting Up Your React Development Environment Choosing a Code Editor for React Development Organizing the Project Folder Structure Working with the Terminal in React Development Starting and Running a React Project React Project Setup Wrap-Up

React Hooks and Context Wrap-Up

useState Hook

The useState hook is used to add state functionality;
It allows us to declare and manage state variables within a component;
By calling the useState hook, we can initialize a state variable and a corresponding setter function;
Updating the state variable triggers a re-render of the component, reflecting the new state value.

useRef Hook

The useRef hook provides a way to create mutable variables that persist across component renders;
Unlike useState, useRef doesn't trigger a re-render when its value changes;
It's commonly used to access or store references to DOM elements, manage previous values, or preserve values between renders.

useEffect Hook

The useEffect hook enables us to perform side effects;
We can use useEffect to handle tasks such as data fetching, subscriptions, or interacting with the DOM;
By specifying dependencies, we control when the effect runs, optimizing performance and preventing unnecessary re-renders.

useMemo Hook

The useMemo hook allows for the memoization of expensive calculations or computations;
It takes a function and a dependencies array and returns a memoized value;
Providing a dependencies array ensures that the memoized value is only recomputed when the dependencies change. This optimization can significantly improve performance by avoiding unnecessary recalculations.

Context

Context allows passing data through the component tree without requiring explicit props drilling;
It enables global state management and allows components to access shared data;
Context consists of two main parts: the Context object and the Context Provider;
The Context object holds the shared data, while the Provider component wraps the part of the component tree that needs access to that data;
Consuming components can access the data using the useContext hook.

1. Which hook is used to access shared data from a Context in a consuming component?

2. When using the `useEffect` hook, what is the purpose of specifying dependencies in the dependency array?

3. What is the primary benefit of memoizing values using the `useMemo` hook?

Which hook is used to access shared data from a Context in a consuming component?

Selecciona la respuesta correcta

useState()

useRef()

useContext()

useEffect()

When using the useEffect hook, what is the purpose of specifying dependencies in the dependency array?

Selecciona la respuesta correcta

To trigger the effect unconditionally on every render.

To prevent the effect from running.

To control when the effect runs and optimize performance.

What is the primary benefit of memoizing values using the useMemo hook?

Selecciona la respuesta correcta

It avoids unnecessary recalculations, improving performance.

It allows for asynchronous operations.

It triggers re-renders for better performance.

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Sección 3. Capítulo 13

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