[1] Web Applications 1.0 r5869 note canvas.toBlob() as a future feature ( (2011-02-11 07:42:00 +09:00 版)) http://html5.org/tools/web-apps-tracker?from=5868&to=5869

[2] Web Applications 1.0 r6134 Attempt to define canvas.toBlob(). ( (2011-05-13 05:40:00 +09:00 版)) http://html5.org/tools/web-apps-tracker?from=6133&to=6134

[3] Issue 67587 - chromium - Add toBlob to Canvas element. - An open-source project to help move the web forward. - Google Project Hosting (2015-03-21 23:09:19 +09:00 版) https://code.google.com/p/chromium/issues/detail?id=67587

[4] Make the toBlob() callback argument non-nullable · whatwg/html@8cee637 (2015-12-07 15:35:45 +09:00 版) https://github.com/whatwg/html/commit/8cee637caaed8512afb64c7c31a4e35060da3abe

[5] Make quality an explicit argument for canvas image conversion (domenic著, 2016-08-27 03:42:08 +09:00) https://github.com/whatwg/html/commit/7d25c4c2452b705220417ffb951c9b89e04ba50b

[6] Define encoder failure actions for toDataURL/toBlob (junov著, 2017-02-11 23:42:36 +09:00) https://github.com/whatwg/html/commit/93c0a157dbe238582584a0e8c2f621958bb39a45

[7] Remove HTMLCanvasElement.prototype.toBlob; replace with promise-returning convertToBlob · Issue #379 · whatwg/html (2017-05-02 00:12:37 +09:00) https://github.com/whatwg/html/issues/379

[8] Fix toBlob() and convertToBlob() (annevk著, 2018-01-25 16:10:41 +09:00) https://github.com/whatwg/html/commit/d28a66a8df60a6d7719f950dc2965d893d384b22

[9] convertToBlob() and toBlob(): what happens in parallel? · Issue #3386 · whatwg/html (2018-01-27 16:46:25 +09:00) https://github.com/whatwg/html/issues/3386

[10] Fix toBlob() and convertToBlob() by annevk · Pull Request #3393 · whatwg/html (2018-01-27 16:46:55 +09:00) https://github.com/whatwg/html/pull/3393

[11] Give toDataURL() and toBlob() default parameter values (GloverDonovan著, 2019-01-31 05:57:14 +09:00) https://github.com/whatwg/html/commit/b799322188cf33c7caef336bb27fe9223d995b24

[12] Give <canvas>'s toDataURL() and toBlob() default parameter values · Issue #3430 · whatwg/html (2020-08-31 18:22:22 +09:00) https://github.com/whatwg/html/issues/3430

[13] Give toDataURL() and toBlob() default parameter values by GloverDonovan · Pull Request #3477 · whatwg/html (2020-08-31 18:22:44 +09:00) https://github.com/whatwg/html/pull/3477