NOno_wizard·Dec 4, 2017
Here is an existing poly fill (I have not reviewed or tested this. I got it from the caniuse site)
https://github.com/davidmz/apng-canvas
In Evolution of <img>: Gif without the GIFdavidmz
apng-canvas
JavaScript2012–2017
davidmz / apng-canvas
apng-canvas
APNG implementation on canvas.
2Distinct people
2Mentions
0Explicit recommenders
677GitHub stars
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What it is
APNG implementation on canvas.
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Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 5:04:57 PM UTC.
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HN mentions by year2 dated mentions
Observed mentions: 2012-09-17 12:46:32 UTC to 2017-12-04 18:12:37 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2012 | 2012-01-01 00:00:00 UTC | 2013-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2013 | 2013-01-01 00:00:00 UTC | 2014-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2014 | 2014-01-01 00:00:00 UTC | 2015-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2015 | 2015-01-01 00:00:00 UTC | 2016-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2016 | 2016-01-01 00:00:00 UTC | 2017-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2017 | 2017-01-01 00:00:00 UTC | 2018-01-01 00:00:00 UTC | 1 | 0 | 1 |
What Hacker News says
2 sourcesDoesn't GIF already have a differential animation mode since you can set unchanged pixels in each frame to transparent? e.g. http://www.imagemagick.org/Usage/anim_opt/#opt_trans
With PNG24 you'd at least get better colour depth. In which case why not use the same Dispose None technique in APNG (https://wiki.mozilla.org/APNG_Specification#.60fcTL.60:_The_...) and a polyfill (https://github.com/davidmz/apng-canvas) to provide cross-browser support?
Actually it might be preferable to always use the polyfill if you want to do something like the Apple thing where you can scrub around the video. Still doesn't have I-Frames to do frame-skip during fast movements though.
In Animated GIFs the Hard Way