Jquery基础（动画效果的轮播图特效）

前端开发作者： 2024-08-25 15:05:01

jquery文档准备的三种写法： $(document).ready(function() { }); $().ready(function() { }); $(function() { }); jq

$(document).ready(function() {
});

$().ready(() {
});

$(() {
});

$('*') / $('.div') / $('div') / $('#first') /

$('#first,div,.second')

$('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

$('[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]')

$('details > p:first-child')
$('details > p:last-child')
$('details > p:nth-child(2)')
$('details > p:nth-last-child(2)')
$('details > p:only-child')

$('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)')

var inputs = $(':input');
var texts = $(':text'var enabled = $(':enabled'var disabled = $(':disabled'var checked = $(':checked'var selected = $(':selected');

    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(8var 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

<!DOCTYPE html>
<html lang="en"headmeta charset="UTF-8"title>全屏的云南旅游相册</link rel="stylesheet" type="text/css" href="css/style.css"script type="text/javascript" src="js/jquery.js"></script="js/script.js"bodyspannav>
    a href="#">泸沽湖a>丽江古城>茶马古道>就这家·云逸客栈>西双版纳>云南红酒庄>轿子雪山>普者黑>海埂大坝>玉龙湾>昆明郊野公园>欧洲风琴小镇divimg src="images/1.jpg"="images/2.jpg"="images/3.jpg"="images/4.jpg"="images/5.jpg"="images/6.jpg"="images/7.jpg"="images/8.jpg"="images/9.jpg"="images/10.jpg"="images/11.jpg"="images/12.jpg"html>

* { margin: 0; padding: border: none; }

html,body { overflow: hidden; height: 100%; background: #93b3c6; }

span { display: block; width: 16px; 30px auto 40px; border-radius: 50%; #fff; }

nav { position: relative; flex; 78.125vw; 0 auto 45px; justify-content: space-between; }
nav:before { absolute; top: 20px; 10px; content: "";
nav > a { font-size: text-decoration: none; color: #255d7e; 2px solid #5395b4;

div { 75vh; 0 auto; #fff; box-shadow: 0 0 30px 0 rgba(8,1,3,.3); }
div > img { right: bottom: left: 98%; 96%; auto; }

$(document).ready(() {
    var index = 0;

     鼠标事件
    var mouseEvent = (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 = (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;
        }
        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 = () {
        $('img').eq(index)
        .stop().fadeIn('slow')
        .siblings()
        .stop().fadeOut('slow');
    }

     初始化默认显示第一张图
    var init = () {
        index = 0;
        swiper();
    }
    init();
});