Scaling HTML5 canvas width preserving w/h aspect ratio

Question

I have a canvas element with dimensions of 979X482px and I'd like to have it stretch to fit the width of any given browser window, keeping the aspect ratio of width/hight 1 to 1, I want the height to scale relative to width of the canvas. Any suggestions as how to go about doing this with javascript/jQuery?

Answer 1

First you set the width of canvas to 100%

$('#canvas').css('width', '100%');

then update its height base on its width

$(window).resize(function(){
   $('#canvas').height($('#canvas').width() / 2.031);
});

2.031 = 979/482

But you should not attach to $(window).resize like me... it's a bad behavior