Lufuhu

官网：https://appelsiini.net/projects/lazyload/

GitHub：https://github.com/tuupola/lazyload

基本用法

<img class="lazyload" data-src="img/example.jpg" width="765" height="574" />
<img class="lazyload" src="img/example-thumb.jpg" data-src="img/example.jpg" width="765" height="574" />

<script src="https://cdn.jsdelivr.net/npm/lazyload@2.0.0-rc.2/lazyload.js"></script>

<script type="text/javascript">
	lazyload();
</script>