Example of password strength verification function implemented by JS based on regular expressions

Example of password strength verification function implemented by JS based on regular expressions_javascript skills

韦小宝

Release： 2018-01-15 11:22:32

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This article mainly introduces the password strength verification function implemented by JS based on regular expressions, involving javascript event response and regular-based character traversal, judgment and other related operation skills. Friends who are interested in JavaScript can refer to this article

This article describes the password strength verification function implemented by JS based on regular expressions. Share it with everyone for your reference, the details are as follows:

The specific code is as follows:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>www.php.cn  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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