Yuk Belajar Programming

getViewport - window.style.left - di Firefox

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];
}

HTML5 - error di firefox

Kemarin ada error di html5 yang saya buat, ketika dijalankan dengan Firefox.

akhirnya googling deh ...
ketemu: http://www.lynnnayko.com/2012/06/declaration-of-character-encoding-in.html

Ini dia Error nya:
Error: The character encoding of the HTML document was not declared. The document will render with garbled text in some browser configurations if the document contains characters from outside the US-ASCII range. The character encoding of the page must be declared in the document or in the transfer protocol.

Nah begini caranya supaya menghilangkan error tersebut:

Letakkan :
<meta http-equiv="Content-Type" content="text/html" charset="utf-8" />

di <head>
seperti ini:

!DOCTYPE HTML>
<html>
<head>
<title>Animasi PNG Sequence</title>

<meta http-equiv="Content-Type" content="text/html" charset="utf-8" />
<style>
body {
margin: 0px;
padding: 0px;
}

</style>
.........
</html>

resize_canvas html5

function resize_canvas(){
var sizecanvas = document.getElementById("myCanvas");
var sizecontext = sizecanvas.getContext('2d');
if (sizecanvas.width < window.innerWidth){
sizecanvas.width = window.innerWidth;
}

if (sizecanvas.height < window.innerHeight) {
sizecanvas.height = window.innerHeight;
}

innerWidth = window.innerWidth;
innerHeight = window.innerHeight;
outerWidth = window.outerWidth;
outerHeight = window.outerHeight;

sizeDiffW = innerWidth-canvasWidth;
sizeDiffH = innerHeight-canvasHeight;
chkscaleW = innerWidth/canvasWidth;
chkscaleH = innerHeight/canvasHeight;
scaleFix = Math.min(chkscaleW,chkscaleH);

sizecanvas.width=canvasWidth*scaleFix;
sizecanvas.height=canvasHeight*scaleFix;
context.scale(scaleFix, scaleFix);
sizecanvas.style.left=((innerWidth-canvasWidth*scaleFix)/2)+"px";
sizecanvas.style.top=((innerHeight-canvasHeight*scaleFix)/2)+"px";

sizecanvas.style.marginLeft=""+((innerWidth-canvasWidth*scaleFix)/2)+"px";
sizecanvas.style.marginTop=""+((innerHeight-canvasHeight*scaleFix)/2)+"px";
}

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