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, ...

Does clicking trigger other processes too? A gentle explanation of JavaScript event propagation

When adding JavaScript to a website, you may find that clicking a single button triggers other processes as well.For example, this is the phenomenon where pressing a button inside a modal closes the ...