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How to implement the js interception string function

韦小宝Original: 2018-01-17 10:36:132109browse

This article mainly introduces in detail the implementation method of js interception string function. It has certain reference and learning value of js. Friends who are interested in js can refer to this article.

There are 2 ways for js to intercept strings: substring(), slice(), for your reference, the specific content is as follows

The example given here is time.

css file:

body{ text-align:center} 
.con{ 
 margin:100px auto; 
 width:800px; 
 height:400px; 
 border:2px solid #336666;
 border-radius:5px;
 padding-top: 50px;
}

<!DOCTYPE html>
<html>
 <head>
  <meta charset="UTF-8">
  <title>截取字符串</title>
  <script src="../js/jquery-1.10.2.js" type="text/javascript"></script>
  <link href="../css/commons.css" rel="external nofollow" rel="stylesheet" type="text/css" />
 </head>
 <body>
   
  <p class="con">
    时间：<input type=&#39;text&#39; id=&#39;time&#39; name=&#39;time&#39; value="2017-07-01 00:00:00" /><br><br>
    substring结果：<input type=&#39;text&#39; id=&#39;sub_result&#39; name=&#39;sub_result&#39; value="" /><br><br>
    slice结果：<input type=&#39;text&#39; id=&#39;sli_result&#39; name=&#39;sli_result&#39; value="" /><br><br>
    <button>提交</button>
  </p>
   
 <script>
  $("button").click(function(){
   var time_val = $("#time").val();
   
   var sub_res = time_val.substring(5, 10);
   $("#sub_result").val(sub_res);
   
   var sli_res = time_val.slice(5, 10);
   $("#sli_result").val(sli_res);
  });
  
  var stmp = "2017-07-01 00:00:00";
   //使用一个参数
//  alert(stmp.slice(5, 10));//从第3个字符开始,截取到最后个字符;返回"nn.cn"
//  alert(stmp.substring(5, 10));//从第4个字符开始,截取到最后个字符;返回"nn.cn"
//
//  //使用两个参数
//  alert(stmp.slice(1,5))//从第2个字符开始，到第5个字符；返回"cinn"
//  alert(stmp.substring(1,5));//从第2个字符开始，到第5个字符；返回"cinn"
//
//  //如果只用一个参数并且为0的话，那么返回整个参数
//  alert(stmp.slice(0));//返回整个字符串
//  alert(stmp.substring(0));//返回整个字符串
 </script>
 </body>
</html>

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