score:294

Accepted answer

Either change your file extensions to .jsx as mentioned or disable the jsx-filename-extension rule. You can add the following to your config to allow .js extensions for JSX.

"rules": {
  "react/jsx-filename-extension": [1, { "extensions": [".js", ".jsx"] }],
}

score:-1

For future readers who want to write jsx in .js files:

  1. Install npm i react react-dom even if you think you're not writing react.
  2. Install npm i -D @babel/preset-react
  3. In babel config: plugins: ['@babel/plugin-transform-react-jsx']
  4. you should setup module.rules for /\.jsx?$/ files with babel-loader (so you will need to install npm i -D babel-loader too)

score:2

To expound on Martin's answer, it seems that it is not possible, currently, to use JSX in React Native. A PR was created but reverted due to concerns about fragmentation and unknown consequences of having things like index.ios.jsx. I'm not sure how AirBnb works around this or if they do, but I have used basically the same rules block as Martin.

score:4

Following React documentation:

Each JSX element is just syntactic sugar for calling React.createElement(component, props, ...children).

Following Airbnb's style guide:

Do not use React.createElement unless you’re initializing the app from a file that is not JSX.

You could do this:

    //index.js
    const app = React.createElement(App);
    ReactDOM.render(app, document.getElementById('root'));

score:6

If you don't want to change your file extension, you can export a function that returns jsx, and then import and call that function in your js file.

// greeter.jsx

import React from 'react';

export default name => (
  <div>
    {`Hello, ${name}!`}
  </div>
);

and then

// index.js

import ReactDOM from 'react-dom';
import greeter from './components/greeter';

const main = document.getElementsByTagName('main')[0];

ReactDOM.render(greeter('World'), main);

score:15

Call me a dummy if it does not work for you

    "rules": {
        "react/jsx-filename-extension": [0],
        "import/extensions": "off"
    }

score:28

It's work for me. hope to help you.

  1. disable jsx-filename-extension in .eslintrc:

    "rules": { "react/jsx-filename-extension": [0] }

  2. in webpack.config.js:

    resolve: { extensions: ['.js', '.jsx'] },


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