匹配文字中的转义美元符号，但不可变

Question

I'm trying to determine if a value matches a string input by the user. When trying to match a dollar sign, I take the input string and replace the dollar sign with an escaped dollar sign ("\\\\$"). However, this doesn't match, but it will match if instead of assigning this value to a variable I just use the literal string. Here's a console snapshot illustrating this:

why is this happening??

Answer 1

That's not how escaping works exactly, consider:

Your b.toString() !== "\\\\$"

Instead of "$".replace("$", "\\\\\\\\$") you want "$".replace("$", "\\\\$")