Re: [w3c/webcomponents] Make JavaScript Files a Valid Entry Point to a Web Page (#807)

> How would you know it exports a valid html document before running the code? 

If it is directly navigated to (and therefore not clicked on from a "view-source:https" page), my idea would be to scan for the "createHTMLDocument" string. If that string exists in the file, the browser would then run the code and only display a page if that script ultimately exports an html document. If the "createHTMLDocument" string is not located, then the browser could just display source code as usual.

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