The HTML <script> element...

• WHATWG HTML Creating Scripts - https://html.spec.whatwg.org/multipage/webappapis.html#creating-scripts
• WHATWG HTML Fetch descendants of a Module Script - https://html.spec.whatwg.org/multipage/webappapis.html#fetch-the-descendants-of-a-module-script
• WHATWG HTML Internal module script fetching procedure - https://html.spec.whatwg.org/multipage/webappapis.html#internal-module-script-graph-fetching-procedure