jquery文档准备的三种写法：
$(document).ready(function() { }); $().ready(function() { }); $(function() { });
jquery选择器
基本选择器
$('*') / $('.div') / $('div') / $('#first') /
多项选择器
$('#first, div, .second')
层级选择器
$('aside summary') //aside的子元素summary
$('aside > details') //aside的直接子元素details
$('summary + ul') //summary相邻的下一个兄弟元素ul
$('summary ~ ul') //summary之后的所有兄弟元素ul
属性选择器
$('[class]')
$('[class=tool]')
$('[class!=tool]') //class不是tool
$('[class^=tool_]') //tool_开头
$('[class$=vs]') // vs结束
$('[class*=vs]') //含有vs
$('[type][src]')
$('[class][class*=lang][class$=y]')
过滤器
$('details > p:first-child')
$('details > p:last-child')
$('details > p:nth-child(2)')
$('details > p:nth-last-child(2)')
$('details > p:only-child')
限定type的：
$('details > p:first-of-type')
$('details > p:last-of-type')
$('details > p:nth-of-type(2)')
$('details > p:nth-last-of-type(2)')
$('details > p:only-of-type')
$('p:nth-of-type(3n)')
表单相关：
var inputs = $(':input'); var texts = $(':text'); var enabled = $(':enabled'); var disabled = $(':disabled'); var checked = $(':checked'); var selected = $(':selected');
查找和过滤
var js = $('aside').find('.javascript'); var details = $('aside').children('details'); var js_parent = js.parent(); var sass = less.next(); var css = less.prev(); var li = $('li').eq(8); var lis = php.siblings(); var python = allLis.filter('.python'); //返回带有类名 " python'" var noPython= allLis.not(".python'") //返回不带有类名 " python”的
jqeury事件
实现全屏的云南旅游相册（带动画效果）
index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>全屏的云南旅游相册</title> <link rel="stylesheet" type="text/css" href="css/style.css"> <script type="text/javascript" src="js/jquery.js"></script> <script type="text/javascript" src="js/script.js"></script> </head> <body> <span></span> <nav> <a href="#">泸沽湖</a> <a href="#">丽江古城</a> <a href="#">茶马古道</a> <a href="#">就这家·云逸客栈</a> <a href="#">西双版纳</a> <a href="#">云南红酒庄</a> <a href="#">轿子雪山</a> <a href="#">普者黑</a> <a href="#">海埂大坝</a> <a href="#">玉龙湾</a> <a href="#">昆明郊野公园</a> <a href="#">欧洲风琴小镇</a> </nav> <div> <img src="images/1.jpg"> <img src="images/2.jpg"> <img src="images/3.jpg"> <img src="images/4.jpg"> <img src="images/5.jpg"> <img src="images/6.jpg"> <img src="images/7.jpg"> <img src="images/8.jpg"> <img src="images/9.jpg"> <img src="images/10.jpg"> <img src="images/11.jpg"> <img src="images/12.jpg"> </div> </body> </html>
style.css
* { margin: 0; padding: 0; border: none; } html, body { overflow: hidden; height: 100%; background: #93b3c6; } span { display: block; width: 16px; height: 16px; margin: 30px auto 40px; border-radius: 50%; background: #fff; } nav { position: relative; display: flex; width: 78.125vw; margin: 0 auto 45px; justify-content: space-between; } nav:before { position: absolute; top: 20px; display: block; width: 100%; height: 10px; content: ""; background: #fff; } nav > a { font-size: 20px; position: relative; padding: 10px; text-decoration: none; color: #255d7e; border: 2px solid #5395b4; background: #fff; } div { position: relative; overflow: hidden; width: 78.125vw; height: 75vh; margin: 0 auto; background: #fff; box-shadow: 0 0 30px 0 rgba(8, 1, 3, .3); } div > img { position: absolute; top: 0; right: 0; bottom: 0; left: 0; width: 98%; height: 96%; margin: auto; }
script.js
$(document).ready(function() { var index = 0; // 鼠标事件 var mouseEvent = function(event) { event.stopPropagation();//阻止冒泡 //如果是a元素（点击或者hover都可以） if ($(this)[0].nodeName == 'A') { //索引就是a元素的索引 index = $(this).index(); } else { return true; }; swiper(); }; // 键盘事件 var keyEvent = function(event) { event.stopPropagation(); if (event.keyCode == 37) { // 向左箭头 index = index > 0 ? --index : $('a').length - 1; } else if (event.keyCode == 39) { // 向右箭头 index = index < $('a').length - 1 ? ++index : 0; } else { return true; } swiper(); } // 定义鼠标事件和键盘事件 var events = { mouseenter: mouseEvent, keydown: keyEvent }; // 给a元素添加鼠标事件和键盘事件 $('a').add(document).on(events); var swiper = function() { $('img').eq(index) .stop().fadeIn('slow') .siblings() .stop().fadeOut('slow'); } // 初始化默认显示第一张图 var init = function() { index = 0; swiper(); } init(); });