Resize HTML5 canvas to fit window

Question

How can I automatically scale the HTML5 element to fit the page?

For example, I can get a

to scale by setting th

Answer 1

(function() {

    // get viewport size
    getViewportSize = function() {
        return {
            height: window.innerHeight,
            width:  window.innerWidth
        };
    };

    // update canvas size
    updateSizes = function() {
        var viewportSize = getViewportSize();
        $('#myCanvas').width(viewportSize.width).height(viewportSize.height);
        $('#myCanvas').attr('width', viewportSize.width).attr('height', viewportSize.height);
    };

    // run on load
    updateSizes();

    // handle window resizing
    $(window).on('resize', function() {
        updateSizes();
    });

}());