本文实例为大家分享了JS正则表达式验证密码强度的具体代码，供大家参考，具体内容如下
代码1：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<style type="text/css">
#dv{
width: 300px;
height:200px;
position: absolute;
left:300px;
top:100px;
}
.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>
<div id="dv">
<label for="pwd">密码</label>
<input type="text" id="pwd" maxlength="16"><!--课外话题-->
<div>
<em>密码强度：</em>
<em id="strength"></em>
<div id="strengthLevel" class="strengthLv0"></div>
</div>
</div>
<script src="/UploadFiles/2021-04-02/common.js">
优化代码2：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<style type="text/css">
#dv{
width: 300px;
height:200px;
position: absolute;
left:300px;
top:100px;
}
.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>
<div id="dv">
<label for="pwd">密码</label>
<input type="text" id="pwd" maxlength="16"><!--课外话题-->
<div>
<em>密码强度：</em>
<em id="strength"></em>
<div id="strengthLevel" class="strengthLv0"></div>
</div>
</div>
<script src="/UploadFiles/2021-04-02/common.js">
/**
* 获取指定标签对象
* @param id 标签的id属性值
* @returns {Element}根据id属性值返回指定标签对象
*/
function my$(id) {
return document.getElementById(id);
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。