How is street view done on new Yandex maps on canvas?

Question

Canvas

Do they use WebGL in street view? There, after all, morphing of photos is done when the "head" is turned (lensing). Or can it be done with the same good performance without WebGL?
How can you find out the current mode of operation of a particular canvas (on a specific web page; for example, via F12 in chrome) - is webgl enabled or not, etc., if the JS source is not readable?
At first, the browser put the whole ubuntu on its side to me, barely returned control over the system) Today I launched it again - it flies, and it's livelier than Google.

Answer 1

Canvas cannot work in multiple contexts at the same time. Therefore, in the console you try to get canvas.getContext ('2d') if it returns an object, then it means 2D, if not, WebGL.