A fast, global content delivery network for ES Modules. All modules in NPM are transformed to ESM by esbuild.
import React from 'https://esm.sh/react'
import React from 'https://esm.sh/react@17.0.2'
import { renderToString } from 'https://esm.sh/react-dom/server'
or import non-module(js) files:
import 'https://esm.sh/tailwindcss/dist/tailwind.min.css'
import { Button } from 'https://esm.sh/antd?bundle'
In bundle mode, all dependencies will be bundled into one JS file.
import React from 'https://esm.sh/react?dev'
import React from 'https://esm.sh/react@16.14.0'
import useSWR from 'https://esm.sh/swr?deps=react@16.14.0'
import Daygrid from 'https://esm.sh/@fullcalendar/daygrid'
<link rel="stylesheet" href="https://esm.sh/@fullcalendar/daygrid?css">
import React from 'https://esm.sh/react?target=es2020'
By default, esm.sh will check the browser's User-Agent
to get the build target, or set it based on the target
query. Available targets: es2015 - es2020, esnext, and deno.
esm.sh will resolve the node internal modules (fs, os, etc.) with deno.land/std/node
to support some packages working in Deno, like postcss
:
import postcss from 'https://esm.sh/postcss'
import autoprefixer from 'https://esm.sh/autoprefixer'
const { css } = await postcss([ autoprefixer ]).process(`
backdrop-filter: blur(5px);
user-select: none;
`).async()
console.log(css)
By default, esm.sh will respond with a custom X-TypeScript-Types
HTTP header when types (.d.ts
) are defined. This is useful for deno type checks (link).
You can pass the no-check
query to disable the X-TypeScript-Types
header if some types are incorrect:
import unescape from 'https://esm.sh/lodash/unescape?no-check'
- Main server in HK
- Global CDN by Cloudflare
- China CDN by Aliyun (use mmdb_china_ip_list to split traffic)
You will need Go 1.16+ to compile the server, and ensure supervisor installed on your host machine.
The server runtime will install the nodejs (14 LTS) automatically.
$ git clone https://github.com/postui/esm.sh
$ cd esm.sh
$ sh ./scripts/deploy.sh