取得目前可見視窗內容的尺寸--Javascript
本帖最後由 media 於 2014-12-10 19:08 編輯最近用javascript取視窗的大小時，遇到不同瀏覽器無法偵測或不同的寬高的問題。後來找到下段這段程式碼，當用於點圖放大並顯示於前景中央位置時非常有用。
<script type="text/javascript">
<!--
var viewportwidth;
var viewportheight;
// the more standards compliant browsers (mozilla/netscape/opera/IE7) use window.innerWidth and window.innerHeight
if (typeof window.innerWidth != 'undefined')
{
viewportwidth = window.innerWidth,
viewportheight = window.innerHeight
}
// IE6 in standards compliant mode (i.e. with a valid doctype as the first line in the document)
else if (typeof document.documentElement != 'undefined'
&& typeof document.documentElement.clientWidth !=
'undefined' && document.documentElement.clientWidth != 0)
{
viewportwidth = document.documentElement.clientWidth,
viewportheight = document.documentElement.clientHeight
}
// older versions of IE
else
{
viewportwidth = document.getElementsByTagName('body').clientWidth,
viewportheight = document.getElementsByTagName('body').clientHeight
}
document.write('<p>Your viewport width is '+viewportwidth+'x'+viewportheight+'</p>');
//-->
</script>結果: 在google chrome 顯示結果
來源: Get viewport size (width and height) with javascript
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