這篇文章給大家介紹JavaScript中怎么評估用戶輸入密碼的強(qiáng)度,內(nèi)容非常詳細(xì),感興趣的小伙伴們可以參考借鑒,希望對大家能有所幫助。
10年積累的成都做網(wǎng)站、網(wǎng)站制作經(jīng)驗(yàn),可以快速應(yīng)對客戶對網(wǎng)站的新想法和需求。提供各種問題對應(yīng)的解決方案。讓選擇我們的客戶得到更好、更有力的網(wǎng)絡(luò)服務(wù)。我雖然不認(rèn)識你,你也不認(rèn)識我。但先網(wǎng)站策劃后付款的網(wǎng)站建設(shè)流程,更有龍泉免費(fèi)網(wǎng)站建設(shè)讓你可以放心的選擇與我們合作。
原有代碼請查看:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title></title> </head> <body> <script type="text/javascript"> //CharMode函數(shù) function CharMode(iN) { if (iN >=48&& iN <=57) //數(shù)字 return1; if (iN >=65&& iN <=90) //大寫字母 return2; if (iN >=97&& iN <=122) //小寫 return4; else return8; //特殊字符 } //bitTotal函數(shù) function bitTotal(num) { modes =0; for (i =0; i <4; i++) { if (num &1) modes++; num >>>=1; } return modes; } //checkStrong函數(shù) function checkStrong(sPW) { if (sPW.length <=4) return0; //密碼太短 Modes =0; for (i =0; i < sPW.length; i++) { Modes |= CharMode(sPW.charCodeAt(i)); } return bitTotal(Modes); } //pwStrength函數(shù) function pwStrength(pwd) { O_color ="#eeeeee"; L_color ="#FF0000"; M_color ="#FF9900"; H_color ="#33CC00"; if (pwd ==null|| pwd =='') { Lcolor = Mcolor = Hcolor = O_color; } else { S_level = checkStrong(pwd); switch (S_level) { case0: Lcolor = Mcolor = Hcolor = O_color; case1: Lcolor = L_color; Mcolor = Hcolor = O_color; break; case2: Lcolor = Mcolor = M_color; Hcolor = O_color; break; default: Lcolor = Mcolor = Hcolor = H_color; } document.getElementById("strength_L").style.background = Lcolor; document.getElementById("strength_M").style.background = Mcolor; document.getElementById("strength_H").style.background = Hcolor; return; } } </script> <form name="form1" action=""> 輸入密碼:<input type="password" size="10" onkeyup="pwStrength(this.value)" onblur="pwStrength(this.value)"> <br> 密碼強(qiáng)度: <table width="217" border="1" cellspacing="0" cellpadding="1" bordercolor="#cccccc" height="23" style='display: inline'> <tr align="center" bgcolor="#eeeeee"> <td width="33%" id="strength_L"> 弱 </td> <td width="33%" id="strength_M"> 中 </td> <td width="33%" id="strength_H"> 強(qiáng) </td> </tr> </table> </form> </body> </html>
首先我們來改善一下上面博友的驗(yàn)證函數(shù)為如下代碼:
var PagePage = Page || {}; PagePage.Utility = Page.Utility || {}; PagePage.Utility.Registration = Page.Utility.Registration || {}; //獲取密碼強(qiáng)度 Page.Utility.Registration.getPasswordLevel = function (password) { if (password == null || password == '') return 0; if (password.length <= 4) return 0; //密碼太短 var Modes = 0; for (i = 0; i < password.length; i++) { Modes |= CharMode(password.charCodeAt(i)); } return bitTotal(Modes); //CharMode函數(shù) function CharMode(iN) { if (iN >= 48 && iN <= 57) //數(shù)字 return 1; if (iN >= 65 && iN <= 90) //大寫字母 return 2; if (iN >= 97 && iN <= 122) //小寫 return 4; else return 8; //特殊字符 } //bitTotal函數(shù) function bitTotal(num) { modes = 0; for (i = 0; i < 4; i++) { if (num & 1) modes++; num >>>= 1; } return modes; } };
然后來創(chuàng)建View Model,但是引用Knockout之前,我們首先要引用Knockout的Js類庫(具體介紹請查看Knockout應(yīng)用開發(fā)指南的系列教程)
View model代碼如下:
var viewModel = { Password: ko.observable(""), Ocolor: "#eeeeee" };
對于密碼強(qiáng)度以及顏色的值依賴于密碼字符串的值,所以我們需要為他們聲明依賴屬性,代碼如下:
viewModel.PasswordLevel = ko.dependentObservable(function () { return Page.Utility.Registration.getPasswordLevel(this.Password()); }, viewModel); viewModel.Lcolor = ko.dependentObservable(function () { //根據(jù)密碼強(qiáng)度判斷***個格顯示的背景色 return this.PasswordLevel() == 0 ? this.Ocolor : (this.PasswordLevel() == 1 ? "#FF0000" : (this.PasswordLevel() == 2 ? "#FF9900" : "#33CC00")) }, viewModel); viewModel.Mcolor = ko.dependentObservable(function () { //根據(jù)密碼強(qiáng)度判斷第二個格顯示的背景色 return this.PasswordLevel() < 2 ? this.Ocolor : (this.PasswordLevel() == 2 ? "#FF9900" : "#33CC00") }, viewModel); viewModel.Hcolor = ko.dependentObservable(function () { //根據(jù)密碼強(qiáng)度判斷第三個格顯示的背景色 return this.PasswordLevel() < 3 ? this.Ocolor : "#33CC00" }, viewModel);
然后使用applyBindings方法將view model綁定到該頁面,你可以使用jQuery的ready函數(shù)來執(zhí)行該綁定代碼,也可以在頁面最下方執(zhí)行綁定代碼,我們這里使用了jQuery,代碼如下:
$((function () { ko.applyBindings(viewModel); }));
***,我們再看看這些值怎么動態(tài)綁定到HTML元素上的,請查看如下代碼(其中使用了afterkeydown代替了onKeyUp和onBlur):
<form name="form1" action=""> 輸入密碼: <input type="text" size="10" data-bind="value:Password, valueUpdate: 'afterkeydown'"> <br> 密碼強(qiáng)度: <table width="217" border="1" cellspacing="0" cellpadding="1" bordercolor="#cccccc" height="23" style='display: inline'> <tr align="center" bgcolor="#eeeeee"> <td width="50"data-bind="style: { backgroundColor: Lcolor }">弱</td> <td width="50"data-bind="style: { backgroundColor: Mcolor }">中</td> <td width="50"data-bind="style: { backgroundColor: Hcolor }">強(qiáng)</td> </tr> </table> </form>
然后就OK,運(yùn)行代碼查看,一模一樣的功能展示出來了。
如果去掉為驗(yàn)證而改善的代碼,總代碼肯定是比原有的方式少的。
完整版代碼如下:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <script type="text/javascript" src="http://knockoutjs.com/js/jquery-1.4.2.min.js"></script> <script type="text/javascript" src="http://knockoutjs.com/js/jquery.tmpl.js"></script> <script type="text/javascript" src="http://knockoutjs.com/js/knockout-1.2.1.js"></script> </head> <body> <script type="text/javascript"> var PagePage = Page || {}; PagePage.Utility = Page.Utility || {}; PagePage.Utility.Registration = Page.Utility.Registration || {}; //獲取密碼強(qiáng)度 Page.Utility.Registration.getPasswordLevel =function (password) { if (password ==null|| password =='') return0; if (password.length <=4) return0; //密碼太短 var Modes =0; for (i =0; i < password.length; i++) { Modes |= CharMode(password.charCodeAt(i)); } return bitTotal(Modes); //CharMode函數(shù) function CharMode(iN) { if (iN >=48&& iN <=57) //數(shù)字 return1; if (iN >=65&& iN <=90) //大寫字母 return2; if (iN >=97&& iN <=122) //小寫 return4; else return8; //特殊字符 } //bitTotal函數(shù) function bitTotal(num) { modes =0; for (i =0; i <4; i++) { if (num &1) modes++; num >>>=1; } return modes; } }; var viewModel = { Password: ko.observable(""), Ocolor: "#eeeeee" }; viewModel.PasswordLevel = ko.dependentObservable(function () { return Page.Utility.Registration.getPasswordLevel(this.Password()); }, viewModel); viewModel.Lcolor = ko.dependentObservable(function () { //根據(jù)密碼強(qiáng)度判斷***個格顯示的背景色 returnthis.PasswordLevel() ==0?this.Ocolor : (this.PasswordLevel() ==1?"#FF0000" : (this.PasswordLevel() ==2?"#FF9900" : "#33CC00")) }, viewModel); viewModel.Mcolor = ko.dependentObservable(function () { //根據(jù)密碼強(qiáng)度判斷第二個格顯示的背景色 returnthis.PasswordLevel() <2?this.Ocolor : (this.PasswordLevel() ==2?"#FF9900" : "#33CC00") }, viewModel); viewModel.Hcolor = ko.dependentObservable(function () { //根據(jù)密碼強(qiáng)度判斷第二個格顯示的背景色 returnthis.PasswordLevel() <3?this.Ocolor : "#33CC00" }, viewModel); $((function () { ko.applyBindings(viewModel); })); </script> <form name="form1" action=""> 輸入密碼:<input type="text" size="10" data-bind="value:Password, valueUpdate: 'afterkeydown'"> <br> 密碼強(qiáng)度: <table width="217" border="1" cellspacing="0" cellpadding="1" bordercolor="#cccccc" height="23" style='display: inline'> <tr align="center" bgcolor="#eeeeee"> <td width="50" id="strength_L" data-bind="style: { backgroundColor: Lcolor }"> 弱 </td> <td width="50" id="strength_M" data-bind="style: { backgroundColor: Mcolor }"> 中 </td> <td width="50" id="strength_H" data-bind="style: { backgroundColor: Hcolor }"> 強(qiáng) </td> </tr> </table> </form> </body> </html>
關(guān)于JavaScript中怎么評估用戶輸入密碼的強(qiáng)度就分享到這里了,希望以上內(nèi)容可以對大家有一定的幫助,可以學(xué)到更多知識。如果覺得文章不錯,可以把它分享出去讓更多的人看到。
分享文章:JavaScript中怎么評估用戶輸入密碼的強(qiáng)度
文章鏈接:http://muchs.cn/article12/gddigc.html
成都網(wǎng)站建設(shè)公司_創(chuàng)新互聯(lián),為您提供網(wǎng)站收錄、App設(shè)計(jì)、用戶體驗(yàn)、定制網(wǎng)站、網(wǎng)站營銷、微信公眾號
聲明:本網(wǎng)站發(fā)布的內(nèi)容(圖片、視頻和文字)以用戶投稿、用戶轉(zhuǎn)載內(nèi)容為主,如果涉及侵權(quán)請盡快告知,我們將會在第一時間刪除。文章觀點(diǎn)不代表本網(wǎng)站立場,如需處理請聯(lián)系客服。電話:028-86922220;郵箱:631063699@qq.com。內(nèi)容未經(jīng)允許不得轉(zhuǎn)載,或轉(zhuǎn)載時需注明來源: 創(chuàng)新互聯(lián)