Find the exact height and width of the viewport in a cross-browser way (no Prototype/jQuery)
JavascriptCross BrowserViewportJavascript Problem Overview
I'm trying to find the exact height and width of a browser's viewport, but I suspect that either Mozilla or IE is giving me the wrong number. Here's my method for height:
var viewportHeight = window.innerHeight ||
document.documentElement.clientHeight ||
document.body.clientHeight;
I haven't started on width yet but I'm guessing it's going to be something similar.
Is there a more correct way of getting this information? Ideally, I'd like the solution to work with Safari/Chrome/other browsers as well.
Javascript Solutions
Solution 1 - Javascript
You might try this:
function getViewport() {
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')[0].clientWidth,
viewPortHeight = document.getElementsByTagName('body')[0].clientHeight
}
return [viewPortWidth, viewPortHeight];
}
( http://andylangton.co.uk/articles/javascript/get-viewport-size-javascript/ )
However, it is not even possible to get the viewport information in all browsers (e.g. IE6 in quirks mode). But the above script should do a good job :-)
Solution 2 - Javascript
You may use shorter version:
<script type="text/javascript">
<!--
function getViewportSize(){
var e = window;
var a = 'inner';
if (!('innerWidth' in window)){
a = 'client';
e = document.documentElement || document.body;
}
return { width : e[ a+'Width' ] , height : e[ a+'Height' ] }
}
//-->
</script>
Solution 3 - Javascript
I've always just used document.documentElement.clientHeight/clientWidth. I don't think you need the OR conditions in this case.
Solution 4 - Javascript
Try this..
<script type="text/javascript">
function ViewPort()
{
var w = Math.max(document.documentElement.clientWidth, window.innerWidth || 0)
var h = Math.max(document.documentElement.clientHeight, window.innerHeight || 0)
var viewsize = w + "," + h;
alert("Your View Port Size is:" + viewsize);
}
</script>