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I'm having trouble trying to figure out how to center the canvas in the page. The canvas's code is in a javascript file. Here's the html for the page.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Game Tut</title>
</head>
<body>
<script src="game.js"></script>
</body>
</html>
I've tried something like this in the javascript file.
var canvas = document.createElement("canvas");
canvas.width = 800;
canvas.height = 600;
canvas.tabindex = 0;
canvas.style = "position: absolute; top: 50px; left: 50px; border:2px solid blue"
document.addEventListener('keydown', doKeyDown, true);
var ctx = canvas.getContext("2d");
document.body.appendChild(canvas);
For some reason the blue border or the positioning don't seem to show up in Google Chrome.
690
asked Oct 26 '25 08:10
Try this
the code below made the canvas center
canvas.style = "position: absolute; top: 0px; left: 0px; right: 0px; bottom: 0px; margin: auto; border:2px solid blue";
By the way
document.addEventListener('keydown', doKeyDown, true);
I posted your code but chrome showed the 'doKeyDown' function is undefined so maybe you need to fix this error then your canvas will show correctly.
Error showed
169
answered Oct 28 '25 22:10
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