A simple template for writing web apps into, to save you some time when experimenting. Used in MDN web app demos. See https://developer.mozilla.org/en-US/docs/Web/Apps/App_coding_guidelines#Apps_template for more information on what this template contains.
PLEASE NOTE THAT THIS REPO IS UNMAINTAINED, OUT-OF-DATE, AND CONTAINS REFERENCES TO OBSOLETE CODE LIKE FIREFOX OS MANIFESTS. USING IT IS PROBABLY NOT A GOOD IDEA.