And, yes, we know that other languages have flaws, too. But aside from perhaps PHP, the flaws in other languages are almost never as outright stupid as they are with JavaScript.
Citation needed. There are tons of languages with huge fucking flaws to blow your code and kick your dog.
PHP and Javascript are relatively harmless (if a little brain damaged). At least you don't get buffer overflows using them.
You think C++ has a better design, for example? People forgot how bad Python used to be, pre 2.4?
Nope, as much as I like to rail against the sins of C++, it is a paragon of design virtue next to JS. I've been programming for three decades now and JS is the worst language I have ever seen. I use JS a lot in my day job and it has parts I really like (object constants, for example) but really, as a piece of language design it is really the pits.
If you're writing new C++ code, you're in no way forced to use it. You can use constants or inline functions to achieve the same result in almost all cases.