esm.sh - Visual Studio Code Extension

A Visual Studio Code extension loads types(.d.ts) for esm.sh imports. No npm install required. (Types in node_modules will be used first, if exists)

Using Import Maps

This extension respects importmap script tag in index.html files of your project. With import maps, you can use "bare import specifiers", such as import React from "react", to work.

<!-- index.html -->

<script type="importmap">
  {
    "imports": {
      "react": "https://esm.sh/react@18.3.1"
    }
  }
</script>
<script type="module" src="./app.tsx"></script>

// app.tsx

import { useState } from "react";

export default function App() {
  const [message, setMessage] = useState<string>("Hello World!");
  return <h1>{message}</h1>;
}

JSX Import Source

By default, the extension uses react or preact as the JSX transform runtime if it's specified in the import map. You can change the JSX import source by setting the @jsxRuntime import in the importmap script tag.

<script type="importmap">
  {
    "imports": {
      "@jsxRuntime": "https://esm.sh/react@18.3.1"
    }
  }
</script>

Snippets

This extension provides some useful snippets for working with ESM modules in HTML files.

• importmap: Insert a new import map script tag.
• module: Insert a new module script tag.
• module-with-src: Insert a new module script tag with src attribute.