How can I import firebase-database as an es6 module

Question

I want to import the firebase-database using esm import. I can only find the script version:

<script src="https://www.gstatic.com/firebasejs/7.21.0/firebase-database.js"></script>

What is the url I need for the esm module version?

Note: I do not want a "bare import", I am not using webpack etc. I need a complete url.

There is an older version available on unpkg.com but not the current version.

Answer 1

It turns out there are two CDN's that can provide this: snowpack/skypack, and jspm:

skypack:

import firebase from 'https://cdn.skypack.dev/@firebase/app'
import 'https://cdn.skypack.dev/@firebase/database'

jspm:

import { firebase } from 'https://jspm.dev/@firebase/app'
import 'https://jspm.dev/@firebase/database'

These both deal with "bare import" conversion to JS, and any code conversions required to be JS Modules.

Google does not appear to want to support a module form on their firebase CDN, an Issue to that effect was immediately closed, suggesting complex workflow solutions.

I'm really thankful to the two projects above, supporting simple es6 JS and zero workflow solutions.

Edit: snowpack's esinstall can turn most js files into modules. Here's a node script that brought in all my dependencies:

#!/usr/bin/env node --require esm
import { install } from 'esinstall'
import nodePolyfills from 'rollup-plugin-node-polyfills'
async function run() {
    const foo = await install(
        [
            'mapbox-gl',
            'three',
            'three/examples/jsm/controls/OrbitControls.js',
            'three/src/core/Object3D.js',
            'chart.js',
            'dat.gui',
            'fflate',
            '@turf/turf',
            'stats.js',
            '@firebase/app',
            '@firebase/database',
        ],
        {
            rollup: {
                plugins: [nodePolyfills()],
            },
        }
    )
}
run()