Menu
I was testing html5 canvas element, and wish my canvas to be full screen in the display area. But I found if I set the canvas height to window.innerHeight, the scroll bar will be shown up. I tried and found need to set the height to 5 pixel less, the scroll bar will disappear, but unfortunately it left a white border below the canvas. If it's a div element, everything is fine.
The code I'm using to test is:
<!DOCTYPE html>
<html>
<head>
<title>Test</title>
<script type="text/javascript">
function load() {
var o = document.getElementById('canvas');
if (o) {
o.width = window.innerWidth;
o.height = window.innerHeight - 5;
}
o = document.getElementById('div');
if (o) {
o.style.width = window.innerWidth + 'px';
o.style.height = window.innerHeight + 'px';
}
}
</script>
<style type="text/css">
* {
margin: 0;
padding: 0;
}
body {
background-color: white;
}
#canvas {
background-color: blue;
}
#div {
background-color: green;
}
</style>
</head>
<body onload="load();">
<canvas id="canvas"></canvas>
<!--div id="div"></div-->
</body>
</html>
I've cleared the body margin and padding.
I test it on Chrome 8.0.552, and also it acts same on Firefox 3.6.13 but 4 pixel less is fine.
Anything I missed? Any suggestions will be really appreciated. Thanks a lot.
799
By default canvas, unlike div, is display: inline; so it gets set to vertical-align: baseline;. You can take either of the following approaches to make things naturally fill the window.innerHeight:
#canvas {
background-color: blue;
vertical-align: top;
}
Or:
#canvas {
background-color: blue;
display: block;
}
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
