Web development:
I'm honestly happy that my toxic "senior" colleague is gone.
- Didnt learn a single thing in the last 10 years. Used godamn serverside rendering with Jquery / plain JS for a highly interactive business Web Application. Yeah boii, save that UI state in the relational database, good job.
- Every error in his shit was the error of someone else.
- Manipulative as hell. Type of guy that is your best buddy to gather information.
- Blocked entire technical progress in the Web department by manipulating people. Understandable. I mean if your legacy shit is gone...
- Kept backend developers from doing their job with unjustified complaints about structures... etc to justify that he needed an insane amount of time to implement simple things.
- Cried for every shit to be documented to the last bits. Did never do any documentation himself.

Fuck these people, honestly.

The moment you realize that you have successfully beaten reality with your unit-tests...

There are unit-tests for ...
... the api returning a 408 Http StatusCode when an internal request times out.
... the react app take this status-code and fires an action to display a specific error message for the user.

Every bit of code runs just fine.

Deploy this hell of an app on the server. Dandy Doodle.

Do a smoketest of the new feature.
FAIL!
Chrome starts to crumble during runtime. The api Request freezes.
Firefox takes the 408 api response but fails to interpret it in react app.

So I began to wonder, what the hell is going on.

Actually I recognized that I had the glorious idea to return a clientside error code in a serverside api response.
Glorious stupidity :/

Finally I fixed the whole thingy by returning an 504 (Gateway timeout) instead of 408 (Clientside timeout)

Cheers!

firstly, does anyone know of an online telegram or whatsapp group where i can ask silly stuff regarding web dev and get immediate answers, just like it is here?

secondly i am trying to learn js and there are just too many related terms that are messing with my brain:
"some features are supported ines5/es6/es15/es16/es17 , some are supported in chrome's v8/chakra/spidermonkey/android browser , some features are only supported in "serverside" and blocked in all browsers thanks to browser's vm environment; babel can't read this code, some features are provided only by node js..."
WHAT THE MESS IS THIS?

All i am trying to do is to write code that would make a website visible to everyone. if by specific browser , i want to target, chrome and its subsidaries and android chrome/other android browsers .
for other browsers am willing to make external converters later but don't want to change my code by 1 bit. And from what i know, each browser (at least the browsers am thinking of supporting) has the complete JS compilers already built in

can i or can i not built a complete functional website with those things?

and finally my main question : how to make custom exceptions in vanilla js? i saw this answer on stack overflow:
===================
function InvalidArgumentException(message) {
this.message = message;
// Use V8's native method if available, otherwise fallback
if ("captureStackTrace" in Error)
Error.captureStackTrace(this, InvalidArgumentException);
else
this.stack = (new Error()).stack;
}

InvalidArgumentException.prototype = Object.create(Error.prototype);
InvalidArgumentException.prototype.name = "InvalidArgumentException";
InvalidArgumentException.prototype.constructor = InvalidArgumentException;

Usage:

throw new InvalidArgumentException();
var err = new InvalidArgumentException("Not yet...");

=====================================

where is the error code? what would be the exception details? what is the line number/timestamp of error?why is that function making an error, i thought error/exception is a class in JS?