Installing the JSX Babel Plugin

To upgrade our hello world example to use JSX, we can install the JSX React plugin for Babel since we're already using Babel transpilation.

  jspm install --dev npm:babel-plugin-transform-react-jsx core-js

Inside of jspm.config.js under the jspm-react-component packages entry, add this plugin to Babel using package configuration metadata:


  packages: {
    "jspm-react-component": {
      "main": "component.js",
      "format": "esm",
      "meta": {
        "*.js": {
          "babelOptions": {
            "plugins": ["babel-plugin-transform-react-jsx"]

Alternatively we could also update our package to the jsx file extension here if we wish.

We can then update our component to use JSX syntax:

import React from 'react';
export class HelloWorld extends React.Component {
  render() {
    return <h1>Hello World</h1>;

If not using Babel, a custom JSX plugin can be installed to run before the ES module transpiler, configured via jspm install jsx and setting { meta: { '*.jsx': { loader: 'jsx' } } } in the local application package configuration.