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Can I use triple equals for JavaScript string comparison?

This is an extremely basic question, I know, but I couldn't understand what's going on from Google and Stack Overflow.

I looked here and here to learn how to compare strings in JavaScript. Neither mentioned triple equals (===) in their answers, and said that it's better to use your own function (str1 < str2 ? -1 : str1 > str2).

However, going through explanations about === in Stack Overflow (here and here), the answers contain string comparisons. From what I saw in those answers, === does work for string comparisons, so why wasn't it included in the string comparison answers?

I'm just trying to expand my knowledge in JavaScript.

Thanks for any insight!

like image 304
Neta Avatar asked Nov 22 '15 18:11

Neta


1 Answers

var str1 = "1";
var str2 = 1;
if (str1 == str2) {
      //Below code executes as it's true.
      console.log("Yes, value of both are equal.");
}

if (str1 === str2) {
     //Below code never executes as it's false.
     console.log("No, both are not equal as type differs.");
}

== compares value but === compares value as well as type. === can be used as string comparison but if you are sure that you are just comparing string then == should be sufficient. === is just a better choice.

like image 98
Sudipta Kumar Maiti Avatar answered Sep 28 '22 04:09

Sudipta Kumar Maiti