我想在浏览器中完全加载或下载图片后加载图片。 我不想在下载图像时显示图像。相反,我想显示该图像的较低质量版本,直到在后台加载高质量图像,当图像在后台完全加载时,我想用该图像替换较低质量的图像。
我有两张图片,比如说
$LQimage = "LQabc.jpg";
$HQimg = "HQabc.jpg";
我怎样才能让它发挥作用?
编辑 通过@codebox 发布的答案,此代码有效.. 谢谢 :)
<html>
<head>
<script type="text/javascript">
function load(){
var img = new Image();
var imgUrl = 'HQabc.jpg';
img.onload = function(){
// this gets run once the image has finished downloading
document.getElementById('pp').src = imgUrl;
}
img.src = imgUrl; // this causes the image to get downloaded in the background
}
</script>
</head>
<body onload="load()">
<img id="pp" src="LQabc.jpg" width=600/>
</body>
</html>
最佳答案
应该这样做:
function preLoadImage(){
var img = new Image();
var imgUrl = 'HQabc.jpg';
img.onload = function(){
// this gets run once the image has finished downloading
document.getElementById('idOfImgElement').src = imgUrl;
}
img.src = imgUrl; // this causes the image to get downloaded in the background
}
如果您在页面加载后运行此函数,它应该可以工作:
<body onload="preLoadImage()">
关于php - 完全加载后显示图像,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/12295700/