js实时监听input中值得变化

<!DOCTYPE html>
<html>
<head>
  <title>zepto</title>
  <meta name="name" content="content">
  <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
  <style>
    html,body {
      margin: 0;
      padding: 0;
      font-size: 62.5%;
    }
    .wrap {
      margin: 20px auto;
      width: 500px;
      height: 300px;
      background: #eee;
    }
    .word-area ul,
    .input-area ul{
      list-style: none;
    }
    .word-area label,
    .input-area label{
      float: left;
      margin-top:1.2rem; 
      width: 60px;
      height: 30px;
      text-align: left;
      display: -webkit-box;
      display: -ms-flexbox;
      display: -webkit-flex;
      display: flex;  
      -webkit-box-pack: center;
      -ms-flex-pack: center;
      -webkit-justify-content: center;
      justify-content: center;
      -webkit-box-align: center;
      -ms-flex-align: center;
      -webkit-align-items: center;
      align-items: center;
      color: #2c2828;
    }
    .input-area input {
      width: 200px;
      height: 30px;
      border: 1px solid #ccc;
      border-radius: 6px;
      margin-top: 1.2rem;
      margin-left: 2rem;
      padding: 2px 6px;
      line-height: 30px;    
    }
    .word-area p {
      display: inline-block;
      border: 1px #00bcd4 solid;
      margin: 1.2rem 0  0 2rem;
      padding: 2px 6px;
      width: 200px;
      height: 30px;
      font-family: "Helvetica Neue", Arial, "Hiragino Sans GB", "WenQuanYi Micro Hei", "Microsoft YaHei", sans-serif;
      font-size: 1rem;
      line-height: 30px;
      background: #fff;
    }
    .word-area p:hover{
      cursor:not-allowed;
    }
  </style>
</head>
<body>
  <div class="wrap">
    <div class="input-area">
      <ul>
        <li>
          <label>输入框 1:</label>
          <input type="text" oninput="setShowValue(this,'wordOne');" onporpertychange="setShowValue(this,'wordOne');">
        </li>
        <li>
          <label>输入框 2:</label>
          <input type="text" oninput="setShowValue(this,'wordTwo');"  onporpertychange="setShowValue(this,'wordTwo');">
        </li>
      </ul>
    </div>
    <div class="word-area">
      <ul>
        <li>
          <label>显示框 1:</label>
          <p id="wordOne"></p>
        </li>
        <li>
          <label>显示框 2:</label>
          <p id="wordTwo"></p>
        </li>
      </ul>
    </div>
  </div>
  <script type="text/javascript">
      function setShowValue(self,obj) {
       var value=self.value;
       document.getElementById(obj).innerHTML=value;
      }
  </script>
</body>
</html>
<!DOCTYPE html>  
<html>  
<head>  
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">  
    <title>RunJS</title>  
</head>  
<body>  
    <h1 >  
        实时监测input中值的变化  
    </h1>  
    <input type="text" id="username" autoComplete='off'>  
    <div id="result"></div>  
    <div id="value"></div>  
    <script src="jquery-3.2.1.min.js"></script>
    <script type="text/javascript">
        $(function(){  
            $('#username').bind('input propertychange', function() {  
                $('#result').html('输入的值长度是: ' + $(this).val().length + ' characters');  
                $('#value').html('输入的值是: ' + $(this).val());  
            });            
        });  
    </script>
</body>  
</html> 
原文地址:https://www.cnblogs.com/theWayToAce/p/7015914.html