es-only

Runtime-specific imports for modern JavaScript environments.

Installation

npm install es-only

Usage

Import the environment-specific module to ensure your code only runs in the intended environment:

browser

import 'es-only/browser';

console.log(window.location.href);

bun

import 'es-only/bun';

console.log(Bun.version);

deno

import 'es-only/deno';

console.log(Deno.version);

node

import 'es-only/node';

console.log(process.version);

server-only

import 'es-only/server-only';

// This module can only be used in Server Components
// It will throw an error if imported from Client Components

How it works

Each import uses conditional exports to either do nothing (when running in the correct environment) or throw a runtime error (when running in the wrong environment).

Inspired by

• esm-env
• server-only
• bun-only