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js uses regular expressions for password strength verification

php中世界最好的语言Original: 2018-04-18 10:24:342064browse

This time I will bring you the use of regular expressions for password strength verification in js. What are the precautions for using regular expressions for password strength verification in js? The following is a practical case, let's take a look.

The specific code is as follows:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>密码强度验证</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>

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!

js uses regular expressions for password strength verification

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