Including files from node_modules in index.html causes export issues.

[dumptyd]

🐛 bug report

In my index.html if I do

<script src="./node_modules/some_package/some_file_that_exposes_myModule.js">
<script>
  myModule();
</script>

It compiles fine but in the browser I get myModule is not defined.

🤔 Expected Behavior

Included file should expose the instance/object correctly.

Software	Version(s)
Parcel	1.7.1
Node	8.0.0
Yarn	0.21.3
Operating System	Ubuntu Xenial

[KeineLimonade]

Does your file in node_modules expose myModule as a global variable? Most modules don't do that.
To solve this you could put the calling script in an extra file and require the module there.

[dumptyd]

That works in some cases, but I can't even get something as simple as this to work.

require('jquery/dist/jquery.js');
require('bootstrap/dist/js/bootstrap.min.js');

because bootstrap can't find jquery.

[mischnic]

The issue with jQuery is that it detects that module.exports is available, so it doesn't set window.jQuery:
node_modules/jquery/dist/jquery.js:

	if ( typeof module === "object" && typeof module.exports === "object" ) {

		// For CommonJS and CommonJS-like environments where a proper `window`
		// is present, execute the factory and get jQuery.
		// For environments that do not have a `window` with a `document`
		// (such as Node.js), expose a factory as module.exports.
		// This accentuates the need for the creation of a real `window`.
		// e.g. var jQuery = require("jquery")(window);
		// See ticket #14549 for more info.
		module.exports = global.document ?
			factory( global, true )/* runs in node & parcel*/ :
			function( w ) {
				if ( !w.document ) {
					throw new Error( "jQuery requires a window with a document" );
				}
				return factory( w );
			};
	} else {
		factory( global ); /* runs in browser */
	}

[mischnic]

Duplicate of #333