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React is a JavaScript library for building user interfaces. React is used to build single-page applications. React allows us to create reusable UI components. Start learning React now
React, sometimes referred to as a frontend JavaScript framework, is a JavaScript library created by Facebook. React is a tool for building UI components. How does React Work?
Get started for free . Start by including three scripts, the first two let us write React code in our JavaScripts, and the third, Babel, allows us to write JSX syntax and ES6 in older browsers. You will learn more about JSX in the React JSX chapter.
A class component must include the extends React.Component statement. This statement creates an inheritance to React.Component, and gives your component access to React.Component's functions. The component also requires a render() method, this method returns HTML.
JavaScript is one of the 3 languages all web developers must learn: 1. HTML to define the content of web pages. 2. CSS to specify the layout of web pages. 3. JavaScript to program the behavior of web pages
Create React App doesn't include page routing. React Router is the most popular solution.
Example: We can embed JavaScript expressions in JSX by using curly braces: function Garage (props) { const cars = props.cars; return ( <> <h1>Garage</h1> {cars.length > 0 && <h2> You have {cars.length} cars in your garage. </h2> } </> ); } const cars = ['Ford', 'BMW', 'Audi']; const root = ReactDOM.createRoot (document.getElementById ...
React is a JavaScript library created by Facebook. React is a User Interface (UI) library. React is a tool for building UI components
React Context. React Context is a way to manage state globally. It can be used together with the useState Hook to share state between deeply nested components more easily than with useState alone.
Without JSX: const myElement = React.createElement ('h1', {}, 'I do not use JSX!'); const root = ReactDOM.createRoot (document.getElementById ('root')); root.render (myElement); Run Example ». As you can see in the first example, JSX allows us to write HTML directly within the JavaScript code.
