Detailed graphic and text explanation of using regular expressions in jQuery-JS Tutorial-php.cn

Detailed graphic and text explanation of using regular expressions in jQuery

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Release： 2018-03-30 10:58:07

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This time I will bring you a detailed graphic and text explanation of using regular expressions in jQuery. What are the precautions for using regular expressions in jQuery? The following is a practical case. , let’s take a look.

Basic regular expressions

1. Creation of regular expressions

a) var checkNum = /^[A-Za-z0-9]+$/;
b) var re=new RegExp(“["+s1+"]“,”g”);

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2. Common rules

a) 用户密码：/^[a-zA-Z][a-zA-Z0-9_]{5,20}$/
b) 邮件:/^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/
c) 手机:/^[\d]{5,20}$/
d) 其它常用验证:请百度

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3. Method: test

Case

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>jquery ajax</title>
  <script type="text/javascript" src="public/js/jquery-2.2.3.min.js"></script>
</head>
<body>
<form action="">
  <label>用户名：</label><span id="check_username">检测</span>
  <input type="text" id="t_username" placeholder="请输入"/>
  <hr/>
  <label>邮箱：</label><span id="check_email">检测</span>
  <input type="text" id="t_email" placeholder="请输入"/>
  <hr/>
  <label>手机：</label><span id="check_phone">检测</span>
  <input type="text" id="t_phone" placeholder="请输入"/>
  <hr/>
</form>
</body>
<script>
  $(function () {
    // 用户名
    $("#check_username").click(function(){
      var str = $("#t_username").val();
      var ret = /^[a-zA-Z][a-zA-Z0-9_]{5,20}$/;
      if(ret.test(str)){
        alert('ok');
      }else{
        alert('wrong');
      }
    });
    // 邮件
    $("#check_email").click(function(){
      var str = $("#t_email").val();
      var ret = /^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/;
      if(ret.test(str)){
        alert('ok');
      }else{
        alert('wrong');
      }
    });
    // 手机
    $("#check_phone").click(function(){
      var str = $("#t_phone").val();
      var ret = /^[\d]{5,20}$/;
      if(ret.test(str)){
        alert('ok');
      }else{
        alert('wrong');
      }
    });
  });
</script>
</html>

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Effect Demonstration Picture

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!