有没有办法强制javascript函数首先运行

Question

I have a javascript function on a page that dynamically changes the link for a nav item. Is there any way to guarantee this runs first before any other javascript besides it being the first on the page?

I'm asking because this is an important item and there is a possibility that in the future that something else might break before this script making this unable to run.

Answer 1

If the function is before in the code it will be executed before the rest as JS is a single threaded language. Problem might come that the DOM manipulation is not ready before the rest of the functions try to get the DOM items. That's the tricky part and hard to calculate and predict.

Easiest solution that comes to my mind is using a setTimeout checker with a flag or promises but it looks to me that maybe the approach to the problem should be rethink to not need setTimeouts at all. It's hard to be more precise with the actual code.