canvas' `toBlob` implementation is not tracked by Edge

[kumarharsh]

The Edge platform status website is not even tracking the toBlob method on canvas objects. Here is the relevant W3C Spec: https://www.w3.org/TR/html50/scripting-1.html#dom-canvas-toblob and the MDN documentation: https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/toBlob

Surprisingly, it was there in IE10 from what I see in MDN, but then removed from Edge/IE11. All other browsers support it.

[alrra]

@kumarharsh Care to open a pull request? Thanks!

[kumarharsh]

Sure. I was confused because there had been no discussion regarding this property earlier, so wanted a confirmation if this was an oversight or intentional.

[kumarharsh]

More relevant sources (for documentation):

• https://www.chromestatus.com/feature/4562033294966784
• https://bugs.chromium.org/p/chromium/issues/detail?id=67587
• https://wpdev.uservoice.com/forums/257854-microsoft-edge-developer/suggestions/15107964-support-toblob-on-canvas

It's unclear if this property is there on safari, and on which version. Some of the code has landed in changesets atleast an year ago, but I can't find definitive detail about it:

• https://bugs.webkit.org/show_bug.cgi?id=148878
• https://stackoverflow.com/questions/40258028/canvas-toblob-is-not-recognized-as-a-function-in-safari

[dstorey]

Edge has this prefixed, which AFAICT is the same as IE10:

partial interface HTMLCanvasElement
{
    [Extension] Blob msToBlob();
};

[kumarharsh]

@dstorey thanks. I saw that in MDN, but forgot to check it in Edge and thus missed it in the PR. Updated now.