# 图片模糊加载
需要使用到JS中的HTML对象中的Image类。
# new Image()
基本用法
var img=new Image([宽度],[高度])
属性:border
|complete
|height
|hspace
|lowsrc
|name
|src
|vspace
|width
事件:onabort
|onerror
|onkeydown
|onkeypress
|onkeyup
|onload
参考代码:
var img = new Image();
img.onload = function () {
alert("img is loaded")
};
img.onerror = function () {
alert("error!")
};
img.src = "http://www.baidu.com/img.gif";
function show(){
alert("body is loaded");
}
window.onload = show;
# 具体实现:
<!DOCTYPE html>
<html>
<head>
<title>大图片加载从模糊到清晰</title>
<style type="text/css">
.content {
position: relative;
}
.thumbnails {
width: 300px;
position: absolute;
left: 0;
top: 0;
z-index: 1;
filter: blur(4px);
transition: all 0.7s;
}
.complete {
filter: blur(0);
}
</style>
</head>
<body>
<div class="content">
<img class="thumbnails" src="http://img8.zol.com.cn/bbs/upload/10569/10568721.jpg">
</div>
<script type="text/javascript">
var ele = document.querySelector('.thumbnails');
// 为了看到效果加个延时
setTimeout(function () {
// 若图片URL失效请自行替换
var imgUrl = 'http://img8.zol.com.cn/bbs/upload/10569/10568721.jpg';
var imgObject = new Image();
imgObject.src = imgUrl;//创建一个图片即开始请求图片,
imgObject.onload = function () {//当图像装载完毕时调用的事件。
ele.src = imgUrl;
ele.setAttribute('class', 'thumbnails complete');
}
}, 1000)
</script>
</body>
</html>