Example SystemJS usage

imports.json

{
  "imports": {
    "lodash": "https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js"
  }
}

main.js

import _get from "lodash/get";

const name = _get({name: 'Steve'}, '.name')

console.log({name})

document.querySelector('#name').innerText = name

system-js.html

<div id="name">What is my name??</div>

<script>
  if (typeof Promise === 'undefined')
    document.write('<script src="https://cdnjs.cloudflare.com/ajax/libs/bluebird/3.5.5/bluebird.core.min.js"><\/script>')
  if (typeof fetch === 'undefined')
    document.write('<script src="https://cdnjs.cloudflare.com/ajax/libs/fetch/3.0.0/fetch.min.js"><\/script>')
</script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/4.1.0/system.min.js"
        integrity="sha256-i+j3ZmMaI9nPuzasKbNrT3evNnUewPBf5p9UEJdr2zA="
        crossorigin="anonymous">
</script>
<script type="systemjs-importmap" src="./imports.json"></script>
<script>
  System.import('./main.js')
</script>