youmightnotneedjquery | A resource for doing things

I need to make a static page from the dynamic one with all assets downloaded and all the links converted to local ones and download it in some tmp folder. Like when you press Ctrl+S in a browser. I tried using wget with shell_exec:

Following this answer to a similar question Make position: fixed behavior like sticky (for Vue2), I have tried to implement it in my application.

The solution was a little bit buggy (in some cases it behaved oddly, especially when opening other tabs and coming back), so I decided to implement it using jQuery and it's working as expected.

Here is the working example:

I have googled this question numerous times and never found a satisfactory answer. Most answers seem only to say that "yes, Bootstrap plugins do require jQuery" or "yes, you can use BS without jQuery if you don't use the plugins". Bootstrap's reliance on jQuery (as described in their quick start) strikes me as a poor design decision, for at least the following reasons:

1. jQuery is quite a large and bloated framework, and now any site using BS plugins will have to download it. Granted, BS users can use the slim/minified builds (unless they want to use jQuery AJAX), but even those add not-insignificant load time for a library that may not be used by anything but Bootstrap.
2. jQuery in general seems to be falling out of favor lately, as frameworks like Angular and React grow more popular (see StackOverflow trends). I know old != bad, and jQuery is still almost ubiquitous on the web, but why did the BS developers choose to rely on an over-decade-old framework?
3. Simply requiring jQuery to be

I used fadein from this site http://youmightnotneedjquery.com/ what i want to do is display modal slowly(with this fadein effect). But problem is that i donw know where to exactly put this function. I tried probably everything.

I got jq code I need to convert to ->js<-. For me it doesn't make sense (cause jq is js), code is longer, it's time consuming (I'm not programmer) and give exactly the same effect... not to mention browser compatibility. But...

I want to select all link (a) elements inside lists (li) iterate over them, change values and so on.

In jq one simple line $('li').find('a'); and it works even if there is something more between li and a like: