endsWith in JavaScript

Question

How can I check if a string ends with a particular character in JavaScript?

Example: I have a string

var str = \"mystring#\";

I wa

Answer 1

return this.lastIndexOf(str) + str.length == this.length;

does not work in the case where original string length is one less than search string length and the search string is not found:

lastIndexOf returns -1, then you add search string length and you are left with the original string's length.

A possible fix is

return this.length >= str.length && this.lastIndexOf(str) + str.length == this.length