一个漂亮的js表单验证页面
见图知其意，
主要特性
- 带密码安全系数的判断
- 其他的就没有啥啦
- 嘿嘿嘿
当然，其代码也在Github上
我也准备了一套可以直接Ctrl + v; Ctrl + c 运行的代码
<!doctype html>
<html lang="en"> <head>
<meta charset="UTF-8">
<title>表单验证</title>
<style>
* {
padding: 0;
margin: 0;
box-sizing: border-box;
}
html,body {
background: linear-gradient(to left bottom, #DD6455, #a18cd1);
width: 100%;
height: 100%;
}
.form-container{
background-color:#fff;
width: 768px;
margin: 100px auto;
height: 500px;
border-radius: 10px;
box-shadow: 0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22);
overflow: hidden;
}
.left{
width: 50%;
height: 100%;
float: left;
background: url(../imgs/AbstractSaltBeds_ZH-CN8351691359_1920x1080.jpg) center center/cover no-repeat;
}
.right {
float: right;
width: 50%;
height: 100%;
}
form{
padding: 20px;
height: 100%;
}
.passw-div, .verifi-div, .repassw-div{
position: relative;
}
h1 {
margin: 10px 6px;
}
input {
background-color: #eee;
outline:none; /*不出现蓝色边框*/
width: 60%;
padding: 12px 15px;
margin: 16px 2px;
border-radius: 20px;
border: 1px solid #CE6D39;
transition: 300ms;
font-size: 14px;
} .register-div span {
width: 35%;
height: 40px;
display: block;
border-radius: 20px;
line-height: 40px;
text-align: center;
font-size: 12px;
font-weight: bold;
letter-spacing: 5px;
border: 1px solid #CE6D39;
background-color: #CE6D39;
color: #FFFFFF;
margin: 15px 0 0 15%;
margin-left: 15%;
transition: 300ms;
}
.register-div span:hover{
background-color: #FF4B2B;
box-shadow: 0 2px 11px #B34747
}
.safety-factor-div {
position: absolute;
line-height: 10px;
top: -6px;
left: 0px;
}
.safety-factor-div div{
float: left;
width: 30px;
height: 10px;
border-radius: 5px;
margin: 0 8px;
visibility: hidden;
}
.safety-factor-div span{
float: left;
margin-left: 10px;
font-size: 12px;
visibility: hidden;
}
.passw-div p,.repassw-div p{
position: absolute;
font-size: 12px;
color: #FF4B2B;
top: 28px;
left: 220px;
}
.verifi-div canvas{
position: absolute;
top: 18px;
left: 117px;
width: 90px;
height: 39px;
border-radius: 20px;
border: 1px solid #CE6D39;
background-color: #CE6D39;
text-align: center;
line-height: 40px;
transition: 300ms;
}
input:focus, .verifi-div canvas:hover{
box-shadow: 0 2px 11px #B34747
} </style>
</head>
<body>
<div class="form-container">
<div class="left"></div>
<div class="right">
<form >
<div class="header-div">
<h1>注册</h1>
</div>
<div class="username-div">
<input id="username" type="text" placeholder="用户名">
</div>
<div class="passw-div">
<input id="passw" type="password" placeholder="密码">
<p id="passw-err"></p>
<div class="safety-factor-div">
<span id="safe-head">安全系数</span>
<div id="safe-d1" style="background-color:red;"></div>
<div id="safe-d2" style="background-color:#F0F028;"></div>
<div id="safe-d3" style="background-color:green;"></div>
</div> </div>
<div class="repassw-div">
<input id="repassw" type="password" placeholder="确认密码">
<p id="repassw-err"></p>
</div>
<div class="verifi-div">
<input id="input-code" type="text" placeholder="请输入验证码">
<canvas id="verifi-code"></canvas>
</div>
<div class="register-div">
<span id="register">注册</span>
</div>
</form>
</div>
</div>
</body>
<script>
'use strict'; var username = document.getElementById('username');
var myInput = document.getElementById('passw');
var myReinput = document.getElementById('repassw');
var inputCode = document.getElementById('input-code');
var register = document.getElementById('register');
var canvas = document.getElementById('verifi-code'); var code, password, repassword; myInput.addEventListener('input',function(e){ let safe_head = document.getElementById('safe-head');
let safe_d1 = document.getElementById('safe-d1');
let safe_d2 = document.getElementById('safe-d2');
let safe_d3 = document.getElementById('safe-d3');
let input_err = document.getElementById('passw-err'); console.log("输入密码： " + myInput.value); password = myInput.value;
safe_head.style.visibility = "visible";
switch (checkPwd(password)) {
case 0:{
input_err.innerHTML = "密码不能小于6位";
safe_d1.style.visibility = "visible";
safe_d2.style.visibility = "hidden";
safe_d3.style.visibility = "hidden";
break;
}
case 1:{
input_err.innerHTML = "";
safe_d1.style.visibility = "visible";
safe_d2.style.visibility = "visible";
safe_d3.style.visibility = "hidden";
break;
}
case 2:{
input_err.innerHTML = "";
safe_d1.style.visibility = "visible";
safe_d2.style.visibility = "visible";
safe_d3.style.visibility = "visible";
break;
}
default:{
input_err.innerHTML = "";
}
}
}); myReinput.addEventListener('input',function(e){
let reinput_err = document.getElementById('repassw-err'); console.log("重复密码输入：" + myReinput.value); repassword = myReinput.value;
if(repassword != password){
reinput_err.innerHTML = "确认密码不相同哦";
}
else{
reinput_err.innerHTML = "";
}
}); register.onclick = function () {
if(username.value){
if (password) {
if(password.length >= 6){
if(myReinput.value){
if(myReinput.value == password){
if(code == inputCode.value.toUpperCase()){
alert("登入成功")
} else alert("验证码错误");
} else alert("重复密码不相同哦")
} else alert("请输入重复密码")
}else alert("请输入符合规范的密码")
} else alert("请输入密码");
} else alert("请输入邮箱");
} function createCode() {
let code = "";
var codeLength = 4;
var selectChar = new Array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9,'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z');
for (var i = 0; i < codeLength; i++) {
var charIndex = Math.floor(Math.random() * 36);
code += selectChar[charIndex];
}
console.log("生成验证码 " + code);
return code;
} function draw_canvas(code) {
if (canvas) {
var ctx=canvas.getContext('2d');
ctx.clearRect(0,0,canvas.width,canvas.height);
ctx.font="80px Verdana";
ctx.strokeText(code,25,110);
console.log("canvas 绘制完成")
}
else
console.log("没有找到canvas")
} function checkPwd(str){
var pattern1 = /([0-9]+)/i;
var pattern2 = /([a-z]+)/i;
if(str.length<6 || str.length>20){
return 0;
}
if(pattern1.exec(str)){
if(pattern2.exec(str)){
return 2
}
return 1;
}
} canvas.onclick = function () {
code = createCode();
draw_canvas(code);
}
window.onload = function () {
code = createCode();
draw_canvas(code);
} </script>
</html>
但是这样图片加载不上去，可以去github取,当然也可以用你自己的图片