React has been designed from the start for gradual adoption, and you can use as little or as much React as you need. Whether you want to get a taste of React, add some interactivity to a simple HTML page, or start a complex React-powered app, the links in …

React makes it painless to create interactive UIs. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes. Declarative views make your code more predictable and easier to debug.

Go to react.dev for the new React docs. See Add React to an Existing Project for the recommended ways to add React. Both React and ReactDOM are available over a CDN.

Here is a list of the modern features React 18 uses: Promise; Symbol; Object.assign; The correct polyfill for these features depend on your environment. For many users, you can configure your Browserlist settings. For others, you may need to import polyfills like core-js directly.

Courses include “React Fundamentals” and “Universal React”. Mastering React - Build professional interactive apps with React. React Tutorial - Learn React step by step in an interactive environment with flashcards. Road to React - Your journey to …

React components are small, reusable pieces of code that return a React element to be rendered to the page. The simplest version of React component is a plain JavaScript function that returns a React element:

The techniques you’ll learn in the tutorial are fundamental to building any React app, and mastering it will give you a deep understanding of React. Tip This tutorial is designed for people who prefer to learn by doing .

React faz com que a criação de UIs interativas seja uma tarefa fácil. Crie views simples para cada estado na sua aplicação, e o React irá atualizar e renderizar de forma eficiente apenas os componentes necessários na medida em que os dados mudam.

You can test React components similar to testing other JavaScript code. There are a few ways to test React components. Broadly, they divide into two categories: Rendering component trees in a simplified test environment and asserting on their output. Running a complete app in a realistic browser environment (also known as “end-to-end” tests).

These are toolboxes filled with HTML attributes that are fully supported in JSX and enable us to construct fully accessible, highly functional React components. Each type of widget has a specific design pattern and is expected to function in a certain way by users and user agents alike: