Aren’t familiar with React export default in JavaScript programming language? This post is what you need. Continue reading to discover different export types in React and their functions.

What Are React And React Export?

In case you don’t know what React is, it is a popular JavaScript library designed to build declarative UIs (user interfaces) utilizing a component-based approach. With the aid of React, programmers may build substantial online applications that can modify data without refreshing the page.

React’s primary goals are to be quick, scalable, and easy to use. It only functions with the application’s user interfaces.

You may construct modular code or code divided into different files with the aid of exporting in React. The contents of the file become importable after being exported.

Types Of React Exports

Imports such as import logo from ‘./logo.svg’ and exports such as export default ReactApp; are components of ES6 Modules. In ES6, there are 2 types of exports: named and default exports.

React Named Exports

Named exports, like export Function ExFunc(){}, are those that are exported utilizing the function name. You can import the named modules utilizing import { ExFunc } from ‘module’;. The name of the import ought to match the export name, such as ExFunc in this instance. Notice that one module can include a number of named exports.

React Default Exports

You can use export default to export one single function, primitive, or class from the module. Still, The usage of export default can be done in various ways.

Keep in mind that the export default is typically following the function, as in the below sample.

# react
function App() {
  return (
    <div className="App">
      <header className="App-header">
        <img src={logo} className="App-logo" alt="logo" />
      </header>
    </div>
  );
}

export default App;

It can, however, also be expressed as follows.

# react
export default class ReactApp extends React.Component {
  render() {
    return <p>Exported Using Default Export</p>;
  }
}

Meanwhile, the export default may be written for the function as below.

# react
export default function ReactApp() {
  return <p>Exported Using Default Export</p>
}

Another note is that once you have utilized an export default, Importing it as ReactApp is not required; instead, you can name it whatever you want.

# react
import Y from './ReactApp';

In this case, the name Y is provided to the variable designated to hold the value. Notice that it doesn’t need to be referred to as the origin export.

One more thing to keep in mind while utilizing default export is that only one default export is possible in contrast to named export. Also, a module may include both default export and named export, which may be imported simultaneously.

# react
import Y, { ExFunc1, ExFunc2, etc... } from 'module';

The Bottom Line

Above are all the basics of React export default in JavaScript. Hopefully, this post has cleared out all your confusion about the topic.

Suppose you want to learn more about React in JavaScript; continue with this guide on how to download files in React. Check it out now!