Here's the rub: when you load JavaScript from a third party you should do it asynchronously. You might want to load your own scripts asynchronously too, but| CSS-Tricks
Find out what the browser preload scanner is, how it helps performance, and how you can stay out of its way.| web.dev
JavaScript chapter of the 2022 Web Almanac covering the usage of JavaScript on the web, libraries and frameworks, compression, web components, and source maps.| almanac.httparchive.org