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Chapter 18. Animated GIFs

These days, it's just about impossible to browse the Web without seeing the flashing, bouncing, and wiggling of GIF animation. The animated GIF is ubiquitous, and there are many good reasons fueling its popularity.

  • Users need no special software or plug-in. All they need is a browser that supports animation—which is fortunately the overwhelming majority of browsers in use as of this writing.

  • GIF is the standard file format for the Web. Animated GIFs are not a unique file format in themselves, but merely take advantage of the full capabilities of the original GIF89a specification. Even if a browser cannot display all of its frames, the GIF will still be visible as a static image.

  • They're easy to create. There are scores of GIF animation tools available (some are built into larger web graphics applications), and they're simple to learn and use.

  • They require no server configurations. Because they are standard GIF files, you do not need to define a new file type on the server.

    They use streaming technology. Users don't need to wait for the entire file to download to see something. Each frame displays as soon as it downloads.


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