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marquee幻灯片播放插件--余玉玲 #42

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marquee幻灯片播放插件--余玉玲 #42

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e974c7b
marquee幻灯片播放插件--余玉玲
Jun 12, 2019
6fa5a57
add auto play and throttle
Jun 13, 2019
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36 changes: 36 additions & 0 deletions css/index.css
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Original file line number Diff line number Diff line change
@@ -0,0 +1,36 @@
#marquee {
position: relative;
height: 100%;
overflow: hidden;
}

.marquee-container {
position: absolute;
top: 0;
height: 100%;
font-size: 0;
}

.marquee-container img {
display: inline-block;
}

.nav>.next-nav, .nav>.prev-nav {
position: absolute;
width: 24px;
height: 36px;
color: #ccc;
font-size: 36px;
transform: translateY(-18px);
}

.nav>.prev-nav {
left: 12px;
top: 50%;
}

.nav>.next-nav {
right: 12px;
top: 50%;
}

32 changes: 26 additions & 6 deletions index.html
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Original file line number Diff line number Diff line change
@@ -1,6 +1,26 @@
<div id="marquee">
<img>
<img>
<img>
</div>
<script src="./libs/jquery.js"></script>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>轮播图</title>
<link rel="stylesheet" href="./css/index.css">
<link rel="stylesheet" href="https://cdn.staticfile.org/fancybox/3.5.7/jquery.fancybox.min.css" />
</head>
<body>
<div id="marquee">
<div class="marquee-container">
<img src="https://farm8.staticflickr.com/7496/15959236842_6dbcb5b4c8_b.jpg">
<img src="https://farm8.staticflickr.com/7489/15241066224_8864806ffd_b.jpg">
<img src="https://farm4.staticflickr.com/3864/14420515212_9999c800b4_b.jpg">
</div>
<div class="nav">
<div class="prev-nav">&lt;</div>
<div class="next-nav">&gt;</div>
</div>
</div>
<script src="./libs/jquery.js"></script>
<script src="https://cdn.staticfile.org/fancybox/3.5.7/jquery.fancybox.min.js"></script>
<script src="./libs/marquee.js"></script>
<script src="./js/main.js"></script>
</body>
</html>
7 changes: 6 additions & 1 deletion js/main.js
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Original file line number Diff line number Diff line change
@@ -1 +1,6 @@
$('#marquee').marquee()
$('#marquee').marquee({
width: 800,
height: 512,
duration: 500,
interval: 2000,
})
117 changes: 116 additions & 1 deletion libs/marquee.js
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Original file line number Diff line number Diff line change
@@ -1,5 +1,120 @@
$.fn.marquee = function() {
$.fn.marquee = function(setting) {
// 可翻页
// popup when click
// 可以用 fancybox
let marquee = $(this);
let container = marquee.find('.marquee-container');
let imgList = marquee.find('img');
let len = imgList.length;
let curIndex = 0;
let width = setting && setting.width ? setting.width : 400;
let height = setting && setting.height ? setting.height : 256;
let duration = setting && setting.duration ? setting.duration : 500;
let interval = setting && setting.interval ? setting.interval : 2000;
const CONTAINER_WIDTH = width * len;
let stopped = false;
let timer = null;
let transitionEnd = true;

init();
startPlay();

// 初始化
function init() {
let containerHtml = container.html();
// 在container前后各复制一份以实现平滑过渡
container.append(containerHtml);
container.prepend(containerHtml) ;
// 初始化container宽度
$('img').css({'width': `${width}px`});
marquee.css({'width': `${width}px`});
marquee.css({'height': `${height}px`});
container.css({'width': `${CONTAINER_WIDTH*3}px`});
container.css({'left': `${-CONTAINER_WIDTH}px`});
// hover时停止自动播放
$('img').hover(function() {
stopPlay();
}, function() {
startPlay();
});

$('.prev-nav').click(function() {
stopPlay();
throttle(onPrev, 300);
});

$('.next-nav').click(function() {
stopPlay();
throttle(onNext, 300);
});

$('img').fancybox({
showCloseButton: true,
openEffect: 'none',
closeEffect: 'none',
});
}

function onPrev() {
if (transitionEnd) showImg('prev');
}

function onNext() {
if (transitionEnd) showImg('next');
}

function showImg(flag) {
switch (flag) {
case 'prev':
curIndex--;
break;
case 'next':
curIndex++;
break;
case 'auto':
curIndex++;
break;
default:
break;
}
transitionEnd = false;
container.animate({left: `${-CONTAINER_WIDTH-width*curIndex}px`}, duration, function() {
transitionEnd = true;
if (curIndex === len) {
curIndex = 0;
container.css({'left': `${-CONTAINER_WIDTH}px`});
} else if (curIndex === -1) {
curIndex = len - 1;
container.css({'left': `${-CONTAINER_WIDTH-width*(len-1)}px`});
}
});
}

function autoPlay() {
if (stopped) {
clearInterval(timer);
return;
}
timer = setInterval(function() {
showImg('auto');
}, interval);
}

function startPlay() {
stopped = false;
autoPlay();
}

function stopPlay() {
stopped = true;
clearInterval(timer);
}

// 节流
function throttle(fn, t) {
clearTimeout(fn.tId);
fn.tId = setTimeout(function() {
fn();
}, t);
}
}