js uses regular expressions for password strength verification

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:

nbsp;html>


  <meta>
  <title>密码强度验证</title>

<style>
  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>

<p>
  <label>密码</label>
  <input>
  <!--<input type="password" id="inp1" maxlength="16"/>-->
  </p><p>
    <em>密码强度：</em>
    <em></em>
    </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>

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!

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