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JS正则实现密码强度验证功能

小云云asal: 2018-02-07 13:27:051973semak imbas

本文主要和大家介绍JS基于正则表达式实现的密码强度验证功能,涉及javascript事件响应及基于正则的字符遍历、判断等相关操作技巧,需要的朋友可以参考下，希望能帮助到大家。

具体代码如下：

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>www.jb51.net 脚本之家</title>
</head>
<style type="text/css">
  body {
    background: #ccc;
  }
  label {
    width: 40px;
    display: inline-block;
  }
  span {
    color: red;
  }
  .container {
    margin: 100px auto;
    width: 400px;
    padding: 50px;
    line-height: 40px;
    border: 1px solid #999;
    background: #efefef;
  }
  span {
    margin-left: 30px;
    font-size: 12px;
  }
  .wrong {
    color: red
  }
  .right {
    color: green;
  }
  .strengthLv0 {
    height: 6px;
    width: 120px;
    border: 1px solid #ccc;
    padding: 2px;
  }
  .strengthLv1 {
    background: red;
    height: 6px;
    width: 40px;
    border: 1px solid #ccc;
    padding: 2px;
  }
  .strengthLv2 {
    background: orange;
    height: 6px;
    width: 80px;
    border: 1px solid #ccc;
    padding: 2px;
  }
  .strengthLv3 {
    background: green;
    height: 6px;
    width: 120px;
    border: 1px solid #ccc;
    padding: 2px;
  }
</style>
<body>
<p class="container">
  <label>密码</label>
  <input type="text" id="inp1" maxlength="16">
  <!--<input type="password" id="inp1" maxlength="16"/>-->
  <p class="pass-wrap">
    <em>密码强度：</em>
    <em id="strength"></em>
    <p id="strengthLevel" class="strengthLv0"></p>
  </p>
</p>
<script>
  var regEx = /^[1-9]\d{4,9}$/; //匹配qq号
  //找人
  var inp1 = document.getElementById("inp1");
  var strength = document.getElementById("strength");
  var strengthLevel = document.getElementById("strengthLevel");
  var arr = ["", "低", "中", "高"];
  inp1.onkeyup = function () {
    var level = 0;
    if (/[1-9]/.test(this.value)) {
      level++;
    }
    if (/[a-z]/.test(this.value)) {
      level++;
    }
    if (/[^a-z1-9]/.test(this.value)) {
      level++
    }
    if (this.value.length < 6) {
      level = 0;
    }
    strength.innerHTML = arr[level];
    strengthLevel.className = "strengthLv" + level;
  };
  /* inp1.onkeyup = function () {
   var level = 0;
   if (/[1-9]/.test(this.value)) {
   level++;
   }
   if (/[a-z]/.test(this.value)) {
   level++
   }
   if (/[^a-z0-9]/.test(this.value)) {
   level++
   }
   if (inp1.value.length < 6) {
   level = 0;
   }
   strengthLevel.className = "strengthLv"+level;
   strength.innerHTML = arr[level];
   };*/
</script>
</body>
</html>

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