Use ESNext features without bundling tool

Use ESNext features without bundling tool

type = module

All you need is type=module on the script element, and the browser will treat the inline or external script as an ECMAScript module.

<script type=“module”>
  import {sum} from ‘./utils.js’;
  console.log(sum(2,3));
</script>

// utils.js
export function sum(a, b) {
	return a + b;
}

babel

One of the easiest ways to get babel working is to include a link to the Babel CDN directly in HTML, which will compile any code in script blocks that have a type of text/babel .

<!doctype html>
<html>
<head>
  <title>Babel</title>
  <script src='https://unpkg.com/babel-standalone@6.26.0/babel.min.js'></script>
</head>

<body>
  <script type='text/babel'>
    async function f() {
      const data = await new Promise((resolve) => {
        setTimeout(() => {
          resolve('hello world');
        }, 1000)
      });
      console.log(data);
    }

    f();
  </script>
</body>
</html>

Reference

• Learning React, 2nd Edition Book

Notice

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