Jquery基础（动画效果的轮播图特效）

2022-03-23 17:32:18

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="data:images/1.jpg">

    <img src="data:images/2.jpg">

    <img src="data:images/3.jpg">

    <img src="data:images/4.jpg">

    <img src="data:images/5.jpg">

    <img src="data:images/6.jpg">

    <img src="data:images/7.jpg">

    <img src="data:images/8.jpg">

    <img src="data:images/9.jpg">

    <img src="data:images/10.jpg">

    <img src="data:images/11.jpg">

    <img src="data:images/12.jpg">

</div>

</body>

</html>

style.css

* { margin:; padding:; 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:; right:; bottom:; left:; 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();

});

码农公寓

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