一、正则表达式
1.1什么是正则表达式
1.2正则表达式——语法
1.3元字符
1.3.1边界符
1.3.2量词
1.3.3字符类
1.4修饰符
1.5input和change事件
二、正则案例
1.小兔仙新用户注册案例
遇到的问题：
1.立即执行函数 (function(){}());
2. [name=username] css 属性选择器
3.contains判断有没有这个类名
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>131111</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="renderer" content="webkit">
<link rel="shortcut icon" href="./favicon.ico">
<link rel="stylesheet" href="./css/common.css">
<link rel="stylesheet" href="./css/register.css">
<link rel="stylesheet" href="https://at.alicdn.com/t/font_2143783_iq6z4ey5vu.css">
</head>
<body>
<!-- 项部导航 -->
<div class="xtx_topnav">
<div class="wrapper">
<!-- 顶部导航 -->
<ul class="xtx_navs">
<li>
<a href="./login.html">请先登录</a>
</li>
<li>
<a href="./register.html">免费注册</a>
</li>
<li>
<a href="./center-order.html">我的订单</a>
</li>
<li>
<a href="./center.html">会员中心</a>
</li>
<li>
<a href="javascript:;">帮助中心</a>
</li>
<li>
<a href="javascript:;">在线客服</a>
</li>
<li>
<a href="javascript:;">
<i class="mobile sprites"></i>
手机版
</a>
</li>
</ul>
</div>
</div>
<!-- 头部 -->
<div class="xtx_header">
<div class="wrapper">
<!-- 网站Logo -->
<h1 class="xtx_logo"><a href="/">小兔鲜儿</a></h1>
<!-- 主导航 -->
<div class="xtx_navs">
<ul class="clearfix">
<li>
<a href="./index.html">首页</a>
</li>
<li>
<a href="./category01.html">生鲜</a>
</li>
<li>
<a href="./category01.html">美食</a>
</li>
<li>
<a href="./category01.html">餐厨</a>
</li>
<li>
<a href="./category01.html">电器</a>
</li>
<li>
<a href="./category01.html">居家</a>
</li>
<li>
<a href="./category01.html">洗护</a>
</li>
<li>
<a href="./category01.html">孕婴</a>
</li>
<li>
<a href="./category01.html">服装</a>
</li>
</ul>
</div>
<!-- 站内搜索 -->
<div class="xtx_search clearfix">
<!-- 购物车 -->
<a href="./cart-none.html" class="xtx_search_cart sprites">
<i>2</i>
</a>
<!-- 搜索框 -->
<div class="xtx_search_wrapper">
<input type="text" placeholder="搜一搜" onclick="location.href='./search.html'">
</div>
</div>
</div>
</div>
<div class="xtx-wrapper">
<div class="container">
<!-- 卡片 -->
<div class="xtx-card">
<h3>新用户注册</h3>
<form class="xtx-form">
<div data-prop="username" class="xtx-form-item">
<span class="iconfont icon-zhanghao"></span>
<input name="username" type="text" placeholder="设置用户名称">
<span class="msg"></span>
</div>
<div data-prop="phone" class="xtx-form-item">
<span class="iconfont icon-shouji"></span>
<input name="phone" type="text" placeholder="输入手机号码 ">
<span class="msg"></span>
</div>
<div data-prop="code" class="xtx-form-item">
<span class="iconfont icon-zhibiaozhushibiaozhu"></span>
<input name="code" type="text" placeholder="短信验证码">
<span class="msg"></span>
<a class="code" href="javascript:;">发送验证码</a>
</div>
<div data-prop="password" class="xtx-form-item">
<span class="iconfont icon-suo"></span>
<input name="password" type="password" placeholder="设置6至20位字母、数字和符号组合">
<span class="msg"></span>
</div>
<div data-prop="confirm" class="xtx-form-item">
<span class="iconfont icon-suo"></span>
<input name="confirm" type="password" placeholder="请再次输入上面密码">
<span class="msg"></span>
</div>
<div class="xtx-form-item pl50">
<i class="iconfont icon-queren"></i>
已阅读并同意<i>《用户服务协议》</i>
</div>
<div class="xtx-form-item">
<button class="submit">下一步</button>
<!-- <a class="submit" href="javascript:;">下一步</a> -->
</div>
</form>
</div>
</div>
</div>
<!-- 公共底部 -->
<div class="xtx_footer clearfix">
<div class="wrapper">
<!-- 联系我们 -->
<div class="contact clearfix">
<dl>
<dt>客户服务</dt>
<dd class="chat">在线客服</dd>
<dd class="feedback">问题反馈</dd>
</dl>
<dl>
<dt>关注我们</dt>
<dd class="weixin">公众号</dd>
<dd class="weibo">微博</dd>
</dl>
<dl>
<dt>下载APP</dt>
<dd class="qrcode">
<img src="./uploads/qrcode.jpg">
</dd>
<dd class="download">
<span>扫描二维码</span>
<span>立马下载APP</span>
<a href="javascript:;">下载页面</a>
</dd>
</dl>
<dl>
<dt>服务热线</dt>
<dd class="hotline">
400-0000-000
<small>周一至周日 8:00-18:00</small>
</dd>
</dl>
</div>
</div>
<!-- 其它 -->
<div class="extra">
<div class="wrapper">
<!-- 口号 -->
<div class="slogan">
<a href="javascript:;" class="price">价格亲民</a>
<a href="javascript:;" class="express">物流快捷</a>
<a href="javascript:;" class="quality">品质新鲜</a>
</div>
<!-- 版权信息 -->
<div class="copyright">
<p>
<a href="javascript:;">关于我们</a>
<a href="javascript:;">帮助中心</a>
<a href="javascript:;">售后服务</a>
<a href="javascript:;">配送与验收</a>
<a href="javascript:;">商务合作</a>
<a href="javascript:;">搜索推荐</a>
<a href="javascript:;">友情链接</a>
</p>
<p>CopyRight © 小兔鲜儿</p>
</div>
</div>
</div>
</div>
<script>
//立即执行函数 (function(){}());
(function(){
//1.手机验证码
let codeInput=document.querySelector('.code')
codeInput.addEventListener('click',function(){
codeInput.innerHTML='05秒后重新获取'
let num=5
let timer=setInterval(function(){
num--
codeInput.innerHTML=`0${num}秒后重新获取`
if(num===0){
codeInput.innerHTML='重新获取'
clearInterval(timer)
}
},1000)
})
//2.用户名验证
let username=document.querySelector('[name=username]')
username.addEventListener('change',verifyUsername)
function verifyUsername(){
let span=username.nextElementSibling
let reg=/^[a-zA-Z0-9-_]{6,10}$/
if(!reg.test(username.value)){
span.innerHTML='昵称长度为6-10个字符'
return false
}
span.innerHTML=''
return true
}
//3.手机号验证
let phone=document.querySelector('[name=phone]')
phone.addEventListener('change',verifyphone)
function verifyphone(){
let span=phone.nextElementSibling
let reg=/^1(3\d|4[5-9]|5[0-35-9]|6[567]|7[0-8]|8\d|9[0-35-9])\d{8}$/
if(!reg.test(phone.value)){
span.innerHTML='请输入正确的手机号'
return false
}
span.innerHTML=''
return true
}
//4.验证码验证
let code=document.querySelector('[name=code]')
code.addEventListener('change',verifycode)
function verifycode(){
let span=code.nextElementSibling
let reg=/^\d{6}$/
if(!reg.test(code.value)){
span.innerHTML='请输入正确的验证码'
return false
}
span.innerHTML=''
return true
}
//5.密码验证
let password=document.querySelector('[name=password]')
password.addEventListener('change',verifypassword)
function verifypassword(){
let span=password.nextElementSibling
let reg=/^[a-zA-Z0-9-_]{6,20}$/
if(!reg.test(password.value)){
span.innerHTML='请输入6至20位字母、数字和符号组合'
return false
}
span.innerHTML=''
return true
}
//6.密码二次确认
let confirm=document.querySelector('[name=confirm]')
confirm.addEventListener('change',verifyconfirm)
function verifyconfirm(){
let span=confirm.nextElementSibling
if(confirm.value!==password.value){
span.innerHTML='两次密码不一致，请重新输入密码'
return false
}
span.innerHTML=''
return true
}
//7.已阅读
let queren=document.querySelector('.icon-queren')
queren.addEventListener('click',function(){
this.classList.toggle('icon-queren2')
})
//8.下一步
let form=document.querySelector('form')
form.addEventListener('submit',function(e){
if(!verifyUsername()){
e.preventDefault()
}
if(!verifyphone()){
e.preventDefault()
}
if(!verifycode()){
e.preventDefault()
}
if(!verifypassword()){
e.preventDefault()
}
if(!verifyconfirm()){
e.preventDefault()
}
if(!queren.classList.contains('icon-queren2')){
alert('请勾选已阅读并同意')
e.preventDefault()
}
})
}());
</script>
</body>
</html>
2.小兔仙登录案例
1.遇到的问题：required-------h5新特性，里面必须有字段，不填写则有提示框
扫一扫
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