Using JSR with Node.js - Docs

Node.js is a JavaScript runtime built on Chrome’s V8 JavaScript engine.

JSR packages can be used in Node.js by using JSR’s npm compatibility layer.

JSR packages are always ESM-only, so your project must be using "type": "module" in your package.json to use JSR packages.

You can then add JSR packages using your package manager. This will add the package to your package.json and install it into your node_modules folder using your preferred package manager (npm, yarn, or pnpm).

# pnpm 10.9+ and yarn 4.9+
pnpm add jsr:@std/encoding
yarn add jsr:@std/encoding

# npm, bun, and older versions of yarn or pnpm
npx jsr add @std/encoding
bunx jsr add @std/encoding
yarn dlx jsr add @std/encoding
pnpm dlx jsr add @std/encoding

Note: A .npmrc file is created when using the JSR CLI. The .npmrc file that is created should be checked into source control. Without this, future calls to npm install / yarn / pnpm install / bun install will not succeed.

You can then import JSR packages in your code:

import { red } from "@std/fmt/colors";
console.log(red("Hello, world!"));

Running this code will print a red “Hello, world!” text to your terminal.

node main.js

Learn more about using packages.