Why does JavaScript sometimes work and sometimes not? Understanding the basics of loading order

I created a process to open a menu when a button is pressed, but nothing happens.Even with the same JavaScript, it suddenly started working when I changed where the file was loaded.In web development, ...
Ars Technica

Dynamically loading javascript source from a string into the DOM using Jquery

I'm experimenting with dynamic loading of javascript using JQuery. So basically I have a loadScript function that accepts either the URL of a JS file or a javascript source in a string. For the former ...
Search Engine Roundtable

Loading Content With JavaScript Does Not Make It Harder For Google Search

Google has removed a whole section from its JavaScript SEO documentation because it was outdated and Google says loading content with JavaScript does not make it hard for Google Search. Google wrote ...