有時需要獲取圖片的尺寸，這需要在圖片加載完成以后才可以。有三種方式實現，下面一一介紹。
一、load事件
復制代碼 代碼如下:
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>img - load event</title>
</head>
<body>
<img src="http://www.survivalescaperooms.com/uploads/allimg/140505/1022521V6_0.jpg">
<p>loading...</p>
<script type="text/javascript">
img1.onload = function() {
p1.innerHTML = 'loaded'
}
</script>
</body>
</html>
復制代碼 代碼如下:
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>img - readystatechange event</title>
</head>
<body>
<img src="http://www.survivalescaperooms.com/uploads/allimg/140505/1022521V6_0.jpg">
<p>loading...</p>
<script type="text/javascript">
img1.onreadystatechange = function() {
if(img1.readyState=="complete"||img1.readyState=="loaded"){
p1.innerHTML = 'readystatechange:loaded'
}
}
</script>
</body>
</html>
復制代碼 代碼如下:
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>img - complete attribute</title>
</head>
<body>
<img src="http://www.survivalescaperooms.com/uploads/allimg/140505/1022521V6_0.jpg">
<p>loading...</p>
<script type="text/javascript">
function imgLoad(img, callback) {
var timer = setInterval(function() {
if (img.complete) {
callback(img)
clearInterval(timer)
}
}, 50)
}
imgLoad(img1, function() {
p1.innerHTML('加載完畢')
})
</script>
</body>
</html>
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疑難解答
圖片精選
