A standalone, browser compatible build of PhosphorJS.
Just load the bundle into the browser. It can then be used in conjunction with Phosphor Custom Elements to display custom views.
<html>
...
<body>
...
<script src="node_modules/@lukesheard/phosphor-standalone/dist/phosphor.js"></script>
<script>
const {
Widget,
DockPanel
} = window.phosphor
</script>
</body>
</html>