Webp Polyfill

Webp Polyfill is a polyfill (adds support for non-native features) for webp images in the browser.

Created using

• libwebpjs By Dominik Homberger
• segment of libwebpwrapper By tuxlog
• native support detection By James Westgate

Dependencies

• jQuery

Installation

bower

bower install https://github.com/FallingSnow/webp-polyfill.git

When to use

Don't worry about it, webp-polyfill already checks if webp is natively supported.

Example

To evaluate a single img tag.

webpPolyfill.evaluate(jQuery('img'));

To evaluate all img tags in a parent element.

webpPolyfill.evaluateParent('body');

Methods

• evaluate(element[, dontAttach])
  • element - The image element you are trying to turn into a datauri.
  • dontAttach - If you don't want a src attribute listener to be placed on the element so that every time the src changes in the future it will be evaluated, set this to true.
  • returns nothing.
• evaluateParent(element[, dontAttach])
  • element - The parent element in which to search for webp image within.
  • dontAttach - If you don't want a src attribute listener to be placed on the element so that every time the src changes in the future it will be evaluated, set this to true.
  • returns nothing.
• detach(element)
  • element - The image element you want to remove the src attribute listener from.
  • returns nothing.
• getDataUriOfWebpImage(element)
  • element - The image element you want to get a datauri from.
  • returns string
    • string - Contains the datauri.
• getDataUriOfWebpUrl(url)
  • url - The url you want to get a datauri from.
  • returns string
    • string - Contains the datauri.

Special thanks to

All those that made libwebp

License

DWTFYWWI LICENSE Version 1, January 2006

Copyright (C) 2015 Ayrton Sparling

Preamble

The licenses for most software are designed to take away your freedom to share and change it. By contrast, the DWTFYWWI or Do Whatever The Fuck You Want With It license is intended to guarantee your freedom to share and change the software--to make sure the software is free for all its users.

DWTFYWWI LICENSE

TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

0. The author grants everyone permission to do whatever the fuck they want with the software, whatever the fuck that may be.

This license does not apply to components of this software that already have a license by another party.