Jquery基礎（動畫效果的輪播圖特效）

時間 2020-01-05

原文原文鏈接

jquery文檔準備的三種寫法：javascript

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

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

$(function() {
});

jquery選擇器php

基本選擇器css

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

多項選擇器html

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

層級選擇器java

$('aside summary')  //aside的子元素summary
$('aside > details')  //aside的直接子元素details
$('summary + ul')  //summary相鄰的下一個兄弟元素ul
$('summary ~ ul')  //summary以後的全部兄弟元素ul

屬性選擇器node

$('[class]') 
$('[class=tool]')
$('[class!=tool]')  //class不是tool
$('[class^=tool_]')  //tool_開頭
$('[class$=vs]')  // vs結束
$('[class*=vs]') //含有vs
$('[type][src]')
$('[class][class*=lang][class$=y]')

過濾器python

$('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：jquery

$('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)')

表單相關：sass

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

查找和過濾less

    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'); //返回帶有類名 " python'" 
var noPython= allLis.not(".python'") //返回不帶有類名 " python」的

jqeury事件

實現全屏的雲南旅遊相冊（帶動畫效果）

index.html

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>全屏的雲南旅遊相冊</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="#">瀘沽湖</a>
    <a href="#">麗江古城</a>
    <a href="#">茶馬古道</a>
    <a href="#">就這家·雲逸客棧</a>
    <a href="#">西雙版納</a>
    <a href="#">雲南紅酒莊</a>
    <a href="#">轎子雪山</a>
    <a href="#">普者黑</a>
    <a href="#">海埂大壩</a>
    <a href="#">玉龍灣</a>
    <a href="#">昆明郊野公園</a>
    <a href="#">歐洲風琴小鎮</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;

    // 鼠標事件
    var mouseEvent = function(event) {
        event.stopPropagation();//阻止冒泡
        //若是是a元素（點擊或者hover均可以）
        if ($(this)[0].nodeName == 'A') {
            //索引就是a元素的索引
            index = $(this).index();
        } else {
            return true;
        };
        swiper();
    };

    // 鍵盤事件
    var keyEvent = function(event) {
        event.stopPropagation();
        if (event.keyCode == 37) {
            // 向左箭頭
            index = index > 0 ? --index : $('a').length - 1;
        } else if (event.keyCode == 39) {
            // 向右箭頭
            index = index < $('a').length - 1 ? ++index : 0;
        } else {
            return true;
        }
        swiper();
    }

    // 定義鼠標事件和鍵盤事件
    var events = {
        mouseenter: mouseEvent,
        keydown: keyEvent
    };
    // 給a元素添加鼠標事件和鍵盤事件
    $('a').add(document).on(events);

    var swiper = function() {
        $('img').eq(index)
        .stop().fadeIn('slow')
        .siblings()
        .stop().fadeOut('slow');
    }

    // 初始化默認顯示第一張圖
    var init = function() {
        index = 0;
        swiper();
    }
    init();
});

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