canvas

[etsted]

what does it mean that i can back-reference the canvas element through the context object in this script?

 

alert(ctx.canvas.id+" | "+ctx.canvas.width+" | "+ctx.canvas.height);

 

in w3school they would only write "ctx.id".

[Ingolme]

No, I don't believe they would write ctx.id because that wouldn't work.

You get a context object from a canvas element.

var ctx = canvas.getContext("2d");

If you somehow lost the reference to canvas but you still have the context you can get back to the canvas with

var canvas = ctx.canvas;