Could you explain me what this class does?

Question

I read this code somewhere today and I couldn't understand it very well, I don't understand
what exactly happens. Why does the method execute immediately after the object is created? Could someone explain what happens behind the scenes in more detail? I know what result it's gonna give, but I don't understand why it works.

https://code.sololearn.com/Wa2A197A12A2

Answer 1

It seems like I'm not gonna get an answer any time soon, but after I did my own research I believe I probably understood that now, what I didn't understand before was that RegExp,prototype[Symbol.replace]() method is executed when String.prototype.replace() method is used with a regular expression pattern. If anyone wants to know more you can check my notes, they are not perfect however, and some of the stuff I write there can possible be wrong: http://karak10notes.c1.biz/Notes24.html#three