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It specifically gives you an example of how "==" clearly sucks and shows you how "===" fixes it. I don't see why a "guide for professional programmers that know more than the average JS programmer" (as per the request) would need to belabor that any further.

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So what types are converted to what, automatically? And is it only for == or there are other traps?

In most languages that I know this is documented. They don't tell you "this sucks don't use it".

I think this is what you're looking for. 3rd result for "Javascript type coercion": https://2ality.com/2019/10/type-coercion.html

Sorry, I'm looking for a comprehensive manual, not a series of random blog posts. I knew about type coercion because everyone laughs at it, but what about the things I don't know to ask about because I don't know they exist?

Did you... read the link? It's literally exactly what you're asking for.

Sorry for trying to help I guess, good luck.

I did. It explains type coercion. It’s not a comprehensive JavaScript manual.

> So what types are converted to what, automatically? And is it only for == or there are other traps?

This is the question that you asked and that I answered.

If you're looking for the language specification, it's here (first result for "Javascript specification"): https://www.ecma-international.org/ecma-262/11.0/index.html#...

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