[Javascript] String method: endsWith() && startsWith()

With endsWith && startsWith, you can easily find out whether the string ends or starts with some other string:

 

example:

var str = "this is a new world"

var startsWithRes = str.startsWith("this"); //true
var endsWithRes = str.endsWith(world); // true

 

So you don't need to write regex any more.