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demo.html
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demo.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>simple-lazyload</title>
</head>
<script src="./lazyload.js"></script>
<style>
@keyframes slide-up {
0% {
transform: translateY(0);
opacity: 0;
}
1% {
transform: translateY(40px);
opacity: 0;
}
100% {
transform: translateY(0);
opacity: 1;
}
}
.top {
height: 200vh;
}
.box1, .box2, .box3 {
width: 300px;
height: 400px;
background-color: #ededed
}
.box2, .box3 {
background-position: center;
background-size: cover;
background-repeat: no-repeat;
}
img {
width: 100%;
height: 100%;
}
.middle {
height: 100vh;
}
.bottom {
position: relative;
padding: 10vh 20vw;
width: 50vw;
height: 100vh;
border: 3px solid #ED7B60;
border-radius: 10px;
}
.bottom::before {
content: '';
display: block;
position: absolute;
left: 0;
right: 0;
top: 200px;
width: 100%;
height: 10px;
background-color: #ededed;
}
.inner {
opacity: 0;
}
.slide-up {
opacity: 0;
transform: translateY(40px);
animation-name: slide-up;
animation-duration: 1.7s;
animation-delay: .6s;
animation-fill-mode: forwards;
animation-timing-function: cubic-bezier(.25, .46, .45, .94);
}
</style>
<body>
<div class="top">
<div>img</div>
<div class="box1">
<img src="" data-img="./images/1.jpg" alt="">
</div>
</div>
<div class="middle">
<div>background-image</div>
<div class="box2" data-img="./images/2.jpg"></div>
</div>
<div class="bottom">
<div class="inner" data-class="slide-up">
<div>class & background-image</div>
<div class="box3" data-img-custom="./images/3.jpg"></div>
<div>新添加了slide-up类， 我会有slide-up的效果</div>
</div>
</div>
</body>
<script>
const lazy = new Lazyload()
// 支持img 和 class 两种模式
lazy.set({
mode: 'img',
dataset: 'data-img',
offset: '50%',
delay: 1000,
}).set({
mode: 'class',
dataset: 'data-class',
offset: '-80%',
}).set({
mode: 'img',
dataset: 'data-img-custom',
offset: '-80%',
delay: 0,
})
</script>
</html>