Don't do it stictly, there is no need for that, a simple == is better and less likely to error.
But I don't understand the question entirely, "this" will never equal "that", unless you change "this" into "that" when declaring it or afterwards, such as

var word = "this";
word = "that";
if (word == "that") { console.log("word is equal to that"); }


Or


var word = "that";
if (word === "that") { console.log("word is equal to that"); }


The question they're doing is like saying "Change the sentence 'hello world' into 'goodbye world' " and then just awnsering "Change the world 'hello' to 'goodbye' ".
( G/PP 💩💩💩💩💩&#128, Wed 11 Jan 2012, 21:04, Reply)