js密碼強度檢驗

2019-11-19 17:56:06

字體：大中小

來源：轉載

供稿：網友

最近一直在做通行證項目，里面的注冊模塊中輸入密碼需要顯示密碼強度（低中高）。今天就把做的效果給大家分享下，代碼沒有網上搜索的那么復雜，能夠滿足一般的需求。

html 代碼如下：

<!DOCTYPE HTML><html lang="en"><head> <meta charset="utf-8"/> <title>密碼強度</title> <style type="text/css"> #passStrength{height:6px;width:120px;border:1px solid #ccc;padding:2px;} .strengthLv1{background:red;height:6px;width:40px;} .strengthLv2{background:orange;height:6px;width:80px;} .strengthLv3{background:green;height:6px;width:120px;} </style></head><body> <input type="password" name="pass" id="pass" maxlength="16"/> <div class="pass-wrap"> <em>密碼強度：</em> <div id="passStrength"></div> </div></body></html><script type="text/javascript" src="js/passwordStrength.js"></script><script type="text/javascript">new PasswordStrength('pass','passStrength');</script>

js 代碼如下：

復制代碼

function PasswordStrength(passwordID,strengthID){ this.init(strengthID); var _this = this; document.getElementById(passwordID).onkeyup = function(){ _this.checkStrength(this.value); }};PasswordStrength.prototype.init = function(strengthID){ var id = document.getElementById(strengthID); var div = document.createElement('div'); var strong = document.createElement('strong'); this.oStrength = id.appendChild(div); this.oStrengthTxt = id.parentNode.appendChild(strong);};PasswordStrength.prototype.checkStrength = function (val){ var aLvTxt = ['','低','中','高']; var lv = 0; if(val.match(/[a-z]/g)){lv++;} if(val.match(/[0-9]/g)){lv++;} if(val.match(/(.[^a-z0-9])/g)){lv++;} if(val.length < 6){lv=0;} if(lv > 3){lv=3;} this.oStrength.className = 'strengthLv' + lv; this.oStrengthTxt.innerHTML = aLvTxt[lv];};

效果圖：