GIFX

A single file that works like a normal GIF in old clients, but can expose its original format in GIFX-aware pages.

Legacy comparison

Left is the original WebP. Right is the GIF fallback from the same GIFX file.

Original animated WebP
Original source (`examples/anim.webp`).
GIF fallback from GIFX file
Legacy view (`examples/anim-gifx.gif`) shown as plain GIF fallback.

This now uses direct src="examples/anim-gifx.gif" so it always shows the fallback, not the extracted payload.

GIFX-aware view

This image uses data-gifx and is auto-mounted with mountGifxImages().

GIFX-aware mounted image
If animated WebP is supported, you see the original payload. Otherwise you see the GIF fallback.