On 6/19/2013 2:05 PM, James Robinson wrote:
What would a page using Modernizr (or other library) to feature detect WebGL do if the supportsContext('webgl') call succeeds but the later getContext('webgl') call fails?
I don't have an example, I was just explaining how Mozernizr is often used.
I'm also failing to see the utility of the supportsContext() call. It's impossible for a browser to promise that supportsContext('webgl') implies that getContext('webgl') will succeed without doing all of the expensive work, so any correctly authored page will have to handle a getContext('webgl') failure anyway.
Given this, it would seem supportsContext is completely useless. The whole purpose of a feature detection check is to detect if a feature actually works or not. Accuracy is more important than cost.
