如何比较JavaScript中包含字符串的两个变量？ [英] How do I compare two variables containing strings in JavaScript?

问题描述

我想比较两个变量，即字符串，但是我收到错误。

I want compare two variables, that are strings, but I am getting an error.

<script>
    var to_check=$(this).val();
    var cur_string=$("#0").text();
    var to_chk = "that";
    var cur_str= "that";

    if(to_chk==cur_str){
        alert("both are equal");
        $("#0").attr("class","correct");    
    } else {
        alert("both are not equal");
        $("#0").attr("class","incorrect");
    }
</script>

我的if语句有问题吗？

Is something wrong with my if statement?

推荐答案

=== 不是必需的。你知道这两个值都是字符串，所以你不需要比较类型。

=== is not necessary. You know both values are strings so you dont need to compare types.

function do_check()
{
  var str1 = $("#textbox1").val();
  var str2 = $("#textbox2").val();

  if (str1 == str2)
  {
    $(":text").removeClass("incorrect");
    alert("equal");
  }
  else
  {
    $(":text").addClass("incorrect");
    alert("not equal");
  }
}

.incorrect
{
  background: #ff8888;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<input id="textbox1" type="text">
<input id="textbox2" type="text">

<button onclick="do_check()">check</button>

这篇关于如何比较JavaScript中包含字符串的两个变量？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！