大家好，这里是「 从零开始学 Web 系列教程 」，并在下列地址同步更新......
- github：https://github.com/Daotin/Web
- 微信公众号：Web前端之巅
- 博客园：http://www.cnblogs.com/lvonve/
- CSDN：https://blog.csdn.net/lvonve/
在这里我会从 Web 前端零基础开始，一步步学习 Web 相关的知识点，期间也会分享一些好玩的项目。现在就让我们一起进入 Web 前端学习的探索之旅吧！
一、CSS3三个案例
1、案例一：携程网首页
需求：页面无横向滚动条，页面随着宽度的改变自动伸缩。
代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
* {
margin: 0;
padding: 0;
}
header {
width: 100%;
display: flex;
}
header > a {
flex: 1;
}
header > a > img {
width: 100%;
}
main {
width: 100%;
padding: 0 10px;
box-sizing: border-box;
}
main > .item {
width: 100%;
height: 100px;
background-color: pink;
border-radius: 10px;
margin-top: 10px;
display: flex;
}
main > .item:nth-of-type(1) {
background-color: rgb(78, 50, 182);
}
main > .item:nth-of-type(2) {
background-color: rgb(31, 153, 209);
}
main > .item:nth-of-type(3) {
background-color: rgb(240, 147, 7);
}
main > .item:nth-of-type(4) {
background-color: rgb(187, 19, 131);
}
.item > .left {
flex: 1;
}
.item > .right {
flex: 2;
flex-wrap: wrap;
display: flex;
}
.item > .right > a {
display: block;
width: 50%;
color: #fff;
text-decoration: none;
line-height: 50px;
text-align: center;
border-left: 1px solid #ccc;
border-bottom: 1px solid #ccc;
box-sizing: border-box;
}
.item > .right > a:nth-last-of-type(-n+2) {
border-bottom: none;
}
.extra {
width: 100%;
display: flex;
}
.extra > a {
flex: 1;
}
.extra > a > img {
width: 100%;
}
footer {
width: 100%;
}
footer > .nav {
width: 100%;
height: 30px;
border-top: 2px solid #ccc;
border-bottom: 2px solid #ccc;
display: flex;
}
footer > .nav > a {
flex: 1;
text-align: center;
line-height: 30px;
text-decoration: none;
color: #666;
}
footer > .link {
text-align: center;
margin-top: 5px;
}
footer > .copyright {
text-align: center;
margin-top: 5px;
}
</style>
</head>
<body>
<div class="container">
<header>
<a href="javascript:;"><img src="./images/banner.jpg"></a>
</header>
<main>
<section class="item">
<div class="left"></div>
<div class="right">
<a href="javascript:;">海外酒店</a>
<a href="javascript:;">团购</a>
<a href="javascript:;">特价机票</a>
<a href="javascript:;">民宿客栈</a>
</div>
</section>
<section class="item">
<div class="left"></div>
<div class="right">
<a href="javascript:;">海外酒店</a>
<a href="javascript:;">团购</a>
<a href="javascript:;">特价机票</a>
<a href="javascript:;">民宿客栈</a>
</div>
</section>
<section class="item">
<div class="left"></div>
<div class="right">
<a href="javascript:;">海外酒店</a>
<a href="javascript:;">团购</a>
<a href="javascript:;">特价机票</a>
<a href="javascript:;">民宿客栈</a>
</div>
</section>
<section class="item">
<div class="left"></div>
<div class="right">
<a href="javascript:;">海外酒店</a>
<a href="javascript:;">团购</a>
<a href="javascript:;">特价机票</a>
<a href="javascript:;">民宿客栈</a>
</div>
</section>
<section class="extra">
<a href="javascript:;"><img src="./images/extra_1.png"></a>
<a href="javascript:;"><img src="./images/extra_2.png"></a>
</section>
</main>
<footer>
<div class="nav">
<a href="javascript:;">电话预定</a>
<a href="javascript:;">下载客户端</a>
<a href="javascript:;">我的</a>
</div>
<p class="link">
<a href="javascript:;">网站地图</a>
<a href="javascript:;">English</a>
<a href="javascript:;">电脑版</a>
</p>
<p class="copyright">© 携程旅行</p>
</footer>
</div>
</body>
</html>
案例截图：
2、案例二：切割轮播图
示例代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
* {
margin: 0;
padding: 0;
}
.container {
width: 560px;
height: 300px;
margin: 100px auto;
position: relative;
}
.container > ul {
width: 100%;
height: 100%;
list-style: none;
/* transform: rotate3d(1,1,0,-45deg); */
transform-style: preserve-3d;
}
ul > li {
width: 20%;
height: 100%;
float: left;
position: relative;
transform-style: preserve-3d;
transition: transform 0.5s;
}
ul > li > span {
position: absolute;
width: 100%;
height: 100%;
}
ul > li:nth-of-type(2) > span {
background-position: -100%;
}
ul > li:nth-of-type(3) > span {
background-position: -200%;
}
ul > li:nth-of-type(4) > span {
background-position: -300%;
}
ul > li:nth-of-type(5) > span {
background-position: -400%;
}
ul > li > span:nth-of-type(1) {
background-image: url("./images/q1.jpg");
transform: translateZ(150px);
}
ul > li > span:nth-of-type(2) {
background-image: url("./images/q2.jpg");
transform: translateY(-150px) rotateX(90deg);
}
ul > li > span:nth-of-type(3) {
background-image: url("./images/q3.jpg");
transform: translateZ(-150px) rotateX(180deg);
}
ul > li > span:nth-of-type(4) {
background-image: url("./images/q4.jpg");
transform: translateY(150px) rotateX(-90deg);
}
.left {
width: 60px;
height: 60px;
background-color: rgba(0,0,0,0.5);
line-height: 60px;
color: #fff;
text-align: center;
font-family: "Consolas";
font-size: 40px;
position: absolute;
left: 0;
top: 50%;
transform: translateY(-50%);
cursor: pointer;
z-index: 10;
}
.right {
width: 60px;
height: 60px;
background-color: rgba(0,0,0,0.5);
line-height: 60px;
color: #fff;
text-align: center;
font-family: "Consolas";
font-size: 40px;
position: absolute;
right: 0;
top: 50%;
transform: translateY(-50%);
cursor: pointer;
z-index: 10;
}
</style>
</head>
<body>
<div class="container">
<ul>
<li>
<span></span>
<span></span>
<span></span>
<span></span>
</li>
<li>
<span></span>
<span></span>
<span></span>
<span></span>
</li>
<li>
<span></span>
<span></span>
<span></span>
<span></span>
</li>
<li>
<span></span>
<span></span>
<span></span>
<span></span>
</li>
<li>
<span></span>
<span></span>
<span></span>
<span></span>
</li>
</ul>
<span class="left"><</span>
<span class="right">></span>
</div>
</body>
<script>
var index = 0;
// 添加节流阀
var flag = true;
document.querySelector(".left").onclick = function () {
if(flag) {
flag = false;
index++;
var liObjs = document.querySelectorAll("li");
for(var i=0; i<liObjs.length; i++) {
liObjs[i].style.transform = "rotateX("+90*index+"deg)";
liObjs[i].style.transitionDelay = i*0.1 + "s";
}
setTimeout(function () {
flag = true;
}, 1000);
}
}
document.querySelector(".right").onclick = function () {
if(flag) {
flag = false;
index--;
var liObjs = document.querySelectorAll("li");
for(var i=0; i<liObjs.length; i++) {
liObjs[i].style.transform = "rotateX("+90*index+"deg)";
liObjs[i].style.transitionDelay = i*0.1 + "s";
}
setTimeout(function () {
flag = true;
}, 1000);
}
}
</script>
</html>
示例效果：
3、案例三：360浏览器首页
案例代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<link rel="stylesheet" href="./css/360Page.css">
<script src="./js/jquery.min.js"></script>
<script src="./js/jquery.fullPage.min.js"></script>
</head>
<body>
<div id="360Page">
<div class="section first">
<div class="logo"></div>
<div class="text">
<img src="./images/text_1.png" alt="">
<img src="./images/text_2.png" alt="">
<img src="./images/text_3.png" alt="">
<img src="./images/text_4.png" alt="">
<img src="./images/text_5.png" alt="">
<img src="./images/text_6.png" alt="">
<img src="./images/text_7.png" alt="">
<img src="./images/text_8.png" alt="">
</div>
<div class="info1"></div>
</div>
<div class="section second">
<div class="shield">
<img src="./images/shield_1.png" alt="">
<img src="./images/shield_2.png" alt="">
<img src="./images/shield_3.png" alt="">
<img src="./images/shield_4.png" alt="">
<img src="./images/shield_5.png" alt="">
<img src="./images/shield_6.png" alt="">
<img src="./images/shield_7.png" alt="">
<img src="./images/shield_8.png" alt="">
<img src="./images/shield_9.png" alt="">
</div>
<div class="info2"></div>
</div>
<div class="section third">
<div class="info3"></div>
<div class="circle">
<div class="rocket"></div>
</div>
</div>
<div class="section fourth">
<div class="search">
<div class="search-bar"></div>
<div class="search-text"></div>
<div class="search-content"></div>
</div>
<div class="info4"></div>
</div>
<div class="section fifth">
<h3>第五屏</h3>
</div>
</div>
</body>
<script>
$(function(){
$('#360Page').fullpage({
sectionsColor: ['#0da5d6', '#2AB561', '#DE8910', '#16BA9D', '#0DA5D6'],
afterLoad: function (anchorLink, index) {
$(".section").removeClass("current");
$(".section:eq("+(index-1)+")").addClass("current");
}
});
});
</script>
</html>
全屏插件的使用：
sectionsColor：设置每一屏的颜色；
afterLoad：回调函数，当每一屏加载完成后需要执行的动作。
CSS 代码：
* {
margin: 0;
padding: 0;
}
.section {
overflow: hidden;
}
/* 第一屏 */
.first {
padding-top: 100px;
}
.first .logo {
width: 251px;
height: 186px;
background-image: url("../images/logo.png");
margin: 0 auto;
}
.first .text {
text-align: center;
margin: 100px 0 20px 0;
}
.first .text > img {
margin: 0 20px;
opacity: 0.1;
transition: margin 0.8s,opacity 0.8s;
}
.first .info1 {
width: 772px;
height: 49px;
background-image: url("../images/info_1.png");
margin: 0 auto;
}
/* 第一屏动画 */
.first.current .text > img {
margin: 0 5px;
opacity: 1;
}
/* 第二屏 */
.second > div{
display: flex;
justify-content: space-around;
align-items: center;
}
.second .shield {
width: 440px;
font-size: 0; /* 消除盾牌之间的间隙*/
}
.second .shield > img {
opacity: 0.1;
transition: transform 0.8s, opacity 0.8s;
}
.second .shield > img:nth-of-type(1){
transform: translate(-100px, 200px) rotate(30deg);
}
.second .shield > img:nth-of-type(2){
transform: translate(300px, 20px) rotate(60deg);
}
.second .shield > img:nth-of-type(3){
transform: translate(300px, 10px) rotate(-50deg);
}
.second .shield > img:nth-of-type(4){
transform: translate(600px, 20px) rotate(-90deg);
}
.second .shield > img:nth-of-type(5){
transform: translate(30px, 200px) rotate(90deg);
}
.second .shield > img:nth-of-type(6){
transform: translate(-30px, -30px) rotate(-30deg);
}
.second .shield > img:nth-of-type(7){
transform: translate(0px, 100px) rotate(-30deg);
}
.second .shield > img:nth-of-type(8){
transform: translate(320px, 150px) rotate(30deg);
}
.second .shield > img:nth-of-type(9){
transform: translate(-190px, -280px) rotate(-30deg);
}
.second .info2 {
width: 635px;
height: 309px;
background-image: url("../images/info_2.png");
}
/* 第二屏动画 */
.second.current .shield > img {
transform: none;
opacity: 1;
}
/* 第三屏 */
.third {
position: relative;
}
.third .info3 {
width: 631px;
height: 278px;
background-image: url("../images/info_3.png");
position: absolute;
left:50%;
top: 50%;
transform: translate(-100%,-50%);
}
.third .circle {
width: 453px;
height: 449px;
background-image: url("../images/circle.png");
position: absolute;
left: 57%;
top: 50%;
transform: translateY(-50%);
}
.third .circle .rocket {
width: 203px;
height: 204px;
background-image: url("../images/rocket.png");
position: absolute;
left: -50%;
top: 150%;
transition: left 0.8s, top 0.8s;
}
/* 第三屏动画 */
.third.current .circle .rocket {
left: 115px;
top: 115px;
}
/* 第四屏 */
.fourth {
position: relative;
}
.fourth .search {
width: 529px;
height: 438px;
position: absolute;
left: 50%;
top: 50%;
transform: translate(-115%, -50%);
overflow: hidden;
}
.fourth .search .search-bar{
width: 529px;
height: 66px;
background-image: url("../images/search.png");
transform: translateX(-100%);
}
.fourth .search .search-text{
width: 0;
height: 22px;
background-image: url("../images/key.png");
position: absolute;
left: 18px;
top: 23px;
}
.fourth .search .search-content{
width: 529px;
height: 0;
background-image: url("../images/result.png");
margin-top: -12px;
}
.fourth .info4 {
width: 612px;
height: 299px;
background-image: url("../images/info_4.png");
position: absolute;
left: 50%;
top: 50%;
transform: translateY(-50%);
}
/* 第四屏动画 */
.fourth.current .search .search-bar{
transform: none;
transition: transform 0.8s;
}
.fourth.current .search .search-text{
width: 99px;
transition: width 0.8s 0.8s steps(5);
}
.fourth.current .search .search-content{
height: 372px;
transition: height 0.8s 1.6s;
}
使用 current 交集选择器实现，当加载完某一全屏后需要执行的动画。
