属性操作～jq链式草足～创建文档及操作～关系
属性操作
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>属性操作</title>
</head>
<body>
<img src="https://ss0.bdstatic.com/70cFuHSh_Q1YnxGkpoWK1HF6hhy/it/u=2808976292,2978436552&fm=26&gp=0.jpg" alt="">
</body>
<script src="js/jquery-3.4.1.min.js"></script>
<script>
let new_src = 'https://ss3.bdstatic.com/70cFv8Sh_Q1YnxGkpoWK1HF6hhy/it/u=1751982463,1459940288&fm=26&gp=0.jpg'
$('img').click(function () {
// js
// this.getAttribute() | this.setAttribute()
// console.log(this.getAttribute('src')); // 获取属性值
// this.setAttribute('src', new_src); // 设置属性值
// jq
// $(this).attr()
// console.log($(this).attr('src')); // 获取属性值
$(this).attr('src', new_src); // 设置属性值
})
</script>
</html>
jq的链式操作
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>jq的链式操作</title>
</head>
<body>
<h1>jq的链式操作</h1>
</body>
<script src="js/jquery-3.4.1.min.js"></script>
<script>
// jq函数的执行结果如果不是明确的 内容 | 子标签 | 属性值 ...，均返回的是对象本身
$('h1').css('color', 'orange').click(function () {
alert(1)
}).attr('title', '呵呵').css({'background': 'pink'})
</script>
</html>
jq创建文档
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>jq创建文档</title>
<style>
.box {
width: 200px;
height: 200px;
background-color: orange;
float: left;
}
</style>
</head>
<body>
<h1>生成一个box</h1>
<!--<div class="box"></div>-->
<!--<div class="box"></div>-->
</body>
<script src="js/jquery-3.4.1.min.js"></script>
<script>
let randomNum = (min, max) => {
return parseInt(Math.random() * (max - min + 1) + min)
};
let getRandomColor = () => {
r = randomNum(0, 255);
g = randomNum(0, 255);
b = randomNum(0, 255);
return 'rgba(' + r + ', ' + g + ', ' + b + ')';
};
$('h1').click(function () {
// 点击一下，生成一个box
// 1）创建一个标签节点
let box = $('<div class="box"></div>');
// 2）设置标签节点（样式、内容、事件）
box.css('background', getRandomColor()).click(function () {
console.log($(this).css('background-color'))
});
// 3）将标签节点添加到页面指定位置
$('body').append(box);
})
</script>
</html>
jq的文档操作
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>文档操作</title>
</head>
<body>
<b class="b1">加粗</b>
<p class="p1">
<span>原内容</span>
</p>
</body>
<script src="js/jquery-3.4.1.min.js"></script>
<script>
// 父在最后加子
$('.p1').append($('.b1'));
// 父在最前加子
// $('.p1').prepend($('.b1'));
// 产生一个副本(本体就不参与操作)，添加到父的最前
// $('.b1').clone().prependTo($('.p1'));
// 添加后兄弟
// $('.p1').after($('.b1'));
// 添加前兄弟
// $('.p1').before($('.b1'));
$('.b1').click(function () {
alert(1)
});
// 清空内部内容与子标签
// $('.p1').empty();
// 不保留事件等的删除自身
// let $b1 = $('.b1').remove();
// 保留事件等的删除自身
let $b1 = $('.b1').detach();
$('.p1').append($b1);
</script>
</html>
jq文档关系
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>jq的文档关系</title>
</head>
<body>
<div class="wrap">
<p class="p0">0</p>
<p class="p1">1</p>
<p class="t">
<a href="">2</a>
<a href="">2</a>
</p>
<p class="p3">3</p>
<p class="p4">4</p>
</div>
</body>
<script src="js/jquery-3.4.1.min.js"></script>
<script>
// 1）从一个含有多个js对象的jq对象中取出只装有一个js对象的jq对象
// $('p')是三个p，只想拿第2个p
// console.log($('p'));
// console.log($('p').eq(1));
// console.log($('p.t'));
let $p = $('p.t');
console.log($p.children());
console.log($p.parent());
console.log($p.parents());
console.log($p.next());
console.log($p.nextAll());
console.log($p.prev());
console.log($p.prevAll());
console.log($p.siblings());
</script>
</html>
jq轮播图案例：包含定时器知识点
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>布局案例</title>
<link rel="stylesheet" href="css/reset.css">
<style>
.scroll-view {
width: 1226px;
height: 460px;
background-color: orange;
margin: 50px auto 0;
position: relative;
}
.scroll-menu {
position: absolute;
background-color: rgba(0, 0, 0, 0.5);
width: 234px;
padding: 20px 0;
}
.scroll-menu a {
display: block;
/*height: 42px;*/
line-height: 42px;
color: white;
/*padding-left: 30px;*/
text-indent: 30px;
}
.scroll-menu a span {
/*参考的不是a，是ul*/
position: absolute;
right: 20px;
}
.scroll-menu a:hover {
background-color: red;
}
.scroll-menu-blank {
width: calc(1226px - 234px);
height: 460px;
background-color: red;
/*参考的是ul*/
position: absolute;
top: 0;
left: 234px;
display: none;
}
.scroll-menu li:hover ~ .scroll-menu-blank {
display: block;
}
.scroll-menu-blank:hover {
display: block;
}
</style>
<style>
.scroll-view {
width: 1226px;
position: relative;
}
.scroll-scroll {
width: 1226px;
height: 460px;
position: absolute;
}
.scroll-img li {
position: absolute;
}
.scroll-img a {
display: block;
}
.scroll-img a img {
width: 100%;
}
</style>
<style>
.scroll-btn div {
position: absolute;
width: 40px;
height: 70px;
font-size: 30px;
line-height: 70px;
text-align: center;
color: rgba(0, 0, 0, 0.1);
cursor: pointer;
}
.scroll-btn div:hover {
background-color: rgba(0, 0, 0, 0.4);
color: white;
}
.scroll-btn-left {
top: calc(50% - 35px);
left: 234px;
}
.scroll-btn-right {
top: calc(50% - 35px);
right: 0;
}
</style>
<style>
.scroll-point {
width: 120px;
height: 40px;
/*background-color: orangered;*/
position: absolute;
right: 10px;
bottom: 0;
}
.scroll-point li {
float: left;
width: 10px;
height: 10px;
border-radius: 50%;
border: 2px solid rgba(0, 0, 0, 0.6);
margin-right: 10px;
cursor: pointer;
background-color: rgba(0, 0, 0, 0.3);
}
.scroll-point li:hover {
background-color: white;
}
</style>
<style>
.scroll-menu, .scroll-btn div, .scroll-point {
z-index: 2;
}
.scroll-img li {
opacity: 0;
/*transition: .5s;*/
}
.scroll-img li.active {
opacity: 1;
z-index: 1;
}
.scroll-point li.active {
background-color: white;
}
</style>
</head>
<body>
<div class="scroll-view">
<!--轮播图-->
<div class="scroll-scroll">
<ul class="scroll-img">
<li class="active">
<a href="https://www.baidu.com">
<img src="img/001.png" alt="">
</a>
</li>
<li>
<a href="">
<img src="img/002.png" alt="">
</a>
</li>
<li>
<a href="">
<img src="img/003.png" alt="">
</a>
</li>
<li>
<a href="">
<img src="img/004.png" alt="">
</a>
</li>
<li>
<a href="">
<img src="img/005.png" alt="">
</a>
</li>
</ul>
<div class="scroll-btn">
<div class="scroll-btn-left"><</div>
<div class="scroll-btn-right">></div>
</div>
<ul class="scroll-point">
<li class="active"></li>
<li></li>
<li></li>
<li></li>
<li></li>
</ul>
</div>
<!--菜单栏-->
<ul class="scroll-menu">
<li>
<a href="">
手机电话卡
<span>></span>
</a>
</li>
<li>
<a href="">
手机电话卡
<span>></span>
</a>
</li>
<li>
<a href="">
手机电话卡
<span>></span>
</a>
</li>
<li>
<a href="">
手机电话卡
<span>></span>
</a>
</li>
<li>
<a href="">
手机电话卡
<span>></span>
</a>
</li>
<li>
<a href="">
手机电话卡
<span>></span>
</a>
</li>
<li>
<a href="">
手机电话卡
<span>></span>
</a>
</li>
<li>
<a href="">
手机电话卡
<span>></span>
</a>
</li>
<li>
<a href="">
手机电话卡
<span>></span>
</a>
</li>
<li>
<a href="">
手机电话卡
<span>></span>
</a>
</li>
<div class="scroll-menu-blank">
</div>
</ul>
</div>
</body>
<script src="js/jquery-3.4.1.min.js"></script>
<script>
let currentIndex = 0;
// 上一张
$('.scroll-btn-left').click(function () {
console.log('上一张');
currentIndex--;
if (currentIndex < 0) currentIndex = 4;
$('.scroll-point li').eq(currentIndex).addClass('active').siblings().removeClass('active');
$('.scroll-img li').eq(currentIndex).addClass('active').siblings().removeClass('active');
});
// 下一张
$('.scroll-btn-right').click(function () {
console.log('下一张');
currentIndex++;
if (currentIndex >= 5) currentIndex = 0;
$('.scroll-point li').eq(currentIndex).addClass('active').siblings().removeClass('active');
$('.scroll-img li').eq(currentIndex).addClass('active').siblings().removeClass('active');
});
// 第几张
$('.scroll-point li').click(function () {
index = $(this).index();
console.log('第%d张', index);
currentIndex = index;
$(this).addClass('active').siblings().removeClass('active');
$('.scroll-img li').eq(index).addClass('active').siblings().removeClass('active');
})
</script>
<script>
// console.log(currentIndex);
// 一次性定时器：setTimeout(fn, 时间)
/*
setTimeout(function () {
currentIndex++;
if (currentIndex >= 5) currentIndex = 0;
$('.scroll-point li').eq(currentIndex).addClass('active').siblings().removeClass('active');
$('.scroll-img li').eq(currentIndex).addClass('active').siblings().removeClass('active');
}, 1000);
*/
// 持续性定时器
let timer = null;
function startScroll() {
timer = setInterval(function () {
currentIndex++;
if (currentIndex >= 5) currentIndex = 0;
$('.scroll-point li').eq(currentIndex).addClass('active').siblings().removeClass('active');
$('.scroll-img li').eq(currentIndex).addClass('active').siblings().removeClass('active');
}, 3500);
}
startScroll();
// 清除定时器
// clearInterval(timer);
// clearTimeout(timer);
function stopScroll() {
clearInterval(timer);
}
// 悬浮停止轮播
$('.scroll-view').mouseover(function () {
stopScroll();
});
// 移开重新轮播
$('.scroll-view').mouseout(function () {
startScroll();
});
</script>
</html>
jq菜单切换
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<link rel="stylesheet" href="css/reset.css">
<style>
.menu {
width: 1226px;
margin: 0 auto;
}
.menu-title {
width: 100%;
/*height: 40px;*/
background-color: #ccc;
}
.menu-title:after {
content: '';
display: block;
clear: both;
}
.menu-title .l {
float: left;
}
.menu-title .r {
float: right;
}
.menu-title .r li {
float: left;
margin-right: 20px;
/*line-height: 40px;*/
cursor: pointer;
padding-top: 10px;
}
.menu-title .r li:hover, .menu-title .r li.active {
color: orangered;
border-bottom: 2px solid orangered;
}
.menu-context {
width: 100%;
/*height: 220px;*/
background-color: pink;
}
.menu-context:after {
content: '';
display: block;
clear: both;
}
.menu-context li {
width: 50%;
float: left;
height: 220px;
border-radius: 50%;
background-color: cyan;
}
.menu-context li a {
display: block;
font: bold 60px/220px '微软雅黑';
text-align: center;
color: red;
}
</style>
</head>
<body>
<div class="menu">
<ul class="menu-title">
<li class="l">
<h1>电子产品</h1>
</li>
<li class="r">
<ul>
<li class="active">
<span>电视</span>
</li>
<li>
<span>手机</span>
</li>
<li>
<span>电脑</span>
</li>
</ul>
</li>
</ul>
<ul class="menu-context">
<li>
<a href="https://www.baidu.com">电视1</a>
</li>
<li>
<a href="https://www.baidu.com">电视2</a>
</li>
</ul>
</div>
</body>
<script src="js/jquery-3.4.1.min.js"></script>
<script>
data = [
[
{
ctx: '电视1',
url: 'https://www.baidu.com'
},
{
ctx: '电视2',
url: 'https://www.baidu.com'
},
],
[
{
ctx: '手机1',
url: 'https://www.sina.com.cn'
},
{
ctx: '手机2',
url: 'https://www.sina.com.cn'
},
],
[]
];
$('.menu-title .r li').mouseover(function () {
$(this).addClass('active').siblings().removeClass('active');
let index = $(this).index();
let ul_data = data[index];
let as = $('.menu-context li a');
// console.log(ul_data);
// console.log(as)
// a个数与数据中字典的个数一致，依次赋值
for (let i = 0; i < ul_data.length; i++) {
as.eq(i).attr('href', ul_data[i].url).text(ul_data[i].ctx);
}
})
</script>
</html>
socket简易后台
import socket
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.bind(('127.0.0.1', 8801))
print('浏览器访问：http://127.0.0.1:8801')
server.listen(5)
conn, _ = server.accept()
data = conn.recv(1024)
print(data)
# 响应一定要满足http协议
conn.send(b'HTTP1.1 200 OK\r\n\r\nhehe\r\n')
flask后台
# pip3 install flask
# pip3 install Flask-Cors
from flask import Flask, request
from flask_cors import CORS
import json
# 声明服务
server = Flask(__name__)
# 解决ajax跨域无法拿到数据
CORS(server, supports_credentials=True)
# 处理请求与响应的函数
@server.route('/')
def home():
return '<h1>Home Page</h1>'
@server.route('/login')
def login():
return '<h1>Login Page</h1>'
@server.route('/data')
def data():
print(request.args)
print(request.args.get('username'))
print(request.args.get('password'))
res_data = {
'status': 0,
'msg': 'request success',
'data': {
'name': 'Owen',
'age': 18
}
}
return json.dumps(res_data)
# 启动服务器
if __name__ == '__main__':
server.run(host='localhost', port=8801)
jq的ajax请求
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>ajax</title>
</head>
<body>
<h1>ajax请求</h1>
<input type="text" name="username" id="username">
<input type="password" name="password" id="password">
<button type="button" class="btn">发送请求</button>
</body>
<script src="js/jquery-3.4.1.min.js"></script>
<script>
$('.btn').click(function () {
username = $('#username').val();
password = $('#password').val();
// 有输入框没内容，直接结束事件，不往后台发送请求
if (!(username && password)) {
return
}
// 代码如何往后台发送请求
$.ajax({
// 请求的路径 - 接口
url: 'http://localhost:8801/data',
// 请求的方式 - get|post
type: 'get',
// 请求的数据
data: {
username,
password,
},
// 请求成功的响应
success: function (response) {
console.log(response, typeof response);
obj = JSON.parse(response);
console.log(obj, typeof obj);
let name = obj.data.name;
$('h1').text(name)
},
// 请求失败的响应
error: function (error) {
console.log(error);
}
})
})
</script>
</html>
bs引入
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>bs的引入</title>
<link rel="stylesheet" href="bs/css/bootstrap.css">
</head>
<body>
<h1 class="bg-success">bs就是按照其规定的页面结构搭建标签</h1>
<h2>给这些标签设置预定义好的类名，引入bs.css就可以直接获得提前写好的样式</h2>
<h2>给这些标签设置预定义好的自定义属性，引入bs.js就可以直接获得提前写好的逻辑</h2>
<h2>bs框架的js文件中采用的是jq语法，所以要使用bs.js要提前导入jq</h2>
<h3>导入bs：本地导入 | CDN导入</h3>
<div class="h1 bg-primary text-center">给.h1类名我就是h1样式</div>
<div class="btn btn-primary btn-block">按钮</div>
</body>
</html>
bs运用
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>bs运用</title>
<link rel="stylesheet" href="bs/css/bootstrap.css">
<style>
ul {
list-style: none;
margin: 0;
padding: 0;
}
h1 {
margin: 0;
line-height: 60px;
}
.o-mn li {
width: 25%;
}
.o-i {
font-size: 40px;
}
</style>
</head>
<body>
<h1 class="bg-primary text-center">bs运用</h1>
<h2>
<i class="o-i glyphicon glyphicon-heart"></i>
<div class="glyphicon glyphicon-envelope"></div>
</h2>
<div class="box">
<nav class="navbar navbar-default">
<div class="container-fluid">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse"
data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="https://www.baidu.com">稻草人</a>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav navbar-right">
<li><a href="#">Owen</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true"
aria-expanded="false">个人中心 <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">信息</a></li>
<li><a href="#">修改密码</a></li>
<li><a href="#">详情页面</a></li>
<li role="separator" class="divider"></li>
<li><a href="#">退出登录</a></li>
</ul>
</li>
</ul>
<form class="navbar-form navbar-right" action="https://www.baidu.com/s">
<div class="form-group">
<input name="wd" type="text" class="form-control" placeholder="搜索内容">
</div>
<button type="submit" class="btn btn-default">搜索</button>
</form>
</div><!-- /.navbar-collapse -->
</div><!-- /.container-fluid -->
</nav>
</div>
<div class="box">
<div class="jumbotron">
<h1>Hello, world!</h1>
<p>这是巨幕这是巨幕这是巨幕这是巨幕这是巨幕这是巨幕这是巨幕这是巨幕这是巨幕这是巨幕这是巨幕</p>
<p class="clearfix bg-primary"><a class="btn btn-primary btn-lg pull-right" href="#" role="button">Learn
more</a></p>
</div>
</div>
<ul class="o-mn clearfix">
<li class="pull-left">
<div class="thumbnail">
<img src="https://ss1.bdstatic.com/70cFuXSh_Q1YnxGkpoWK1HF6hhy/it/u=2633316981,1109819462&fm=26&gp=0.jpg" alt="">
<div class="caption">
<h3>美女</h3>
<p>美女海报</p>
<p>
<a href="javascript:viod(0)" class="btn btn-primary" role="button">购买</a>
<a class="btn btn-danger" href="javascript:viod(0)" role="button">打包</a>
</p>
</div>
</div>
</li>
<li class="pull-left">
<div class="thumbnail">
<img src="https://ss1.bdstatic.com/70cFuXSh_Q1YnxGkpoWK1HF6hhy/it/u=2633316981,1109819462&fm=26&gp=0.jpg" alt="">
<div class="caption">
<h3>美女</h3>
<p>美女海报</p>
<p>
<a href="javascript:viod(0)" class="btn btn-primary" role="button">购买</a>
<a class="btn btn-danger" href="javascript:viod(0)" role="button">打包</a>
</p>
</div>
</div>
</li>
<li class="pull-left">
<div class="thumbnail">
<img src="https://ss1.bdstatic.com/70cFuXSh_Q1YnxGkpoWK1HF6hhy/it/u=2633316981,1109819462&fm=26&gp=0.jpg" alt="">
<div class="caption">
<h3>美女</h3>
<p>美女海报</p>
<p>
<a href="javascript:viod(0)" class="btn btn-primary" role="button">购买</a>
<a class="btn btn-danger" href="javascript:viod(0)" role="button">打包</a>
</p>
</div>
</div>
</li>
<li class="pull-left">
<div class="thumbnail">
<img src="https://ss1.bdstatic.com/70cFuXSh_Q1YnxGkpoWK1HF6hhy/it/u=2633316981,1109819462&fm=26&gp=0.jpg" alt="">
<div class="caption">
<h3>美女</h3>
<p>美女海报</p>
<p>
<a href="javascript:viod(0)" class="btn btn-primary" role="button">购买</a>
<a class="btn btn-danger" href="javascript:viod(0)" role="button">打包</a>
</p>
</div>
</div>
</li>
</ul>
<!--栅格化系统: 将所有标签等分为12等分-->
<style>
/*.box {*/
/*width: 1000px;*/
/*}*/
.b1, .b2, .b3, .b4 {
height: 100px;
}
.b1 {
background-color: orangered;
}
.b2 {
background-color: red;
}
.b3 {
background-color: tomato;
}
.b4 {
background-color: pink;
}
</style>
<div class="box">
<div class="b1 col-md-3 col-sm-6"></div>
<div class="b2 col-md-6 col-md-offset-3 col-sm-6"></div>
<div class="b3 col-xs-1"></div>
<div class="b4 col-xs-11"></div>
</div>
</body>
<script src="js/jquery-3.4.1.min.js"></script>
<script src="bs/js/bootstrap.js"></script>
</html>
程序的道路上一去不复返
