我可以使用三等号进行JavaScript字符串比较吗? [英] Can I use triple equals for JavaScript string comparison?

问题描述

我知道，这是一个非常基本的问题，但是我无法理解Google和Stack Overflow的情况.

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

我在此处和

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).

但是，请阅读有关堆栈溢出中 === 的说明(在这里)，答案中包含字符串比较.从我在这些答案中看到的结果来看， === 确实适用于字符串比较，那么为什么不将其包含在字符串比较答案中?

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?

我只是想扩展我的JavaScript知识.

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

感谢您的见解！

推荐答案

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.");
}

== 比较值，而 === 比较值和类型. === 可以用作字符串比较，但是如果您确定只是比较字符串，则 == 就足够了. === 只是一个更好的选择.

== 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.

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