modernizr
Version:
Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser.
39 lines (35 loc) • 1.12 kB
JavaScript
/*!
{
"name": "Webp Alpha",
"async": true,
"property": "webpalpha",
"aliases": ["webp-alpha"],
"tags": ["image"],
"authors": ["Krister Kari", "Rich Bradshaw", "Ryan Seddon", "Paul Irish"],
"notes": [{
"name": "WebP Info",
"href": "https://developers.google.com/speed/webp/"
}, {
"name": "Article about WebP support",
"href": "https://optimus.keycdn.com/support/webp-support/"
}, {
"name": "Chromium WebP announcement",
"href": "https://blog.chromium.org/2011/11/lossless-and-transparency-encoding-in.html?m=1"
}]
}
!*/
/* DOC
Tests for transparent webp support.
*/
define(['Modernizr', 'addTest'], function(Modernizr, addTest) {
Modernizr.addAsyncTest(function() {
var image = new Image();
image.onerror = function() {
addTest('webpalpha', false, {aliases: ['webp-alpha']});
};
image.onload = function() {
addTest('webpalpha', image.width === 1, {aliases: ['webp-alpha']});
};
image.src = 'data:image/webp;base64,UklGRkoAAABXRUJQVlA4WAoAAAAQAAAAAAAAAAAAQUxQSAwAAAABBxAR/Q9ERP8DAABWUDggGAAAADABAJ0BKgEAAQADADQlpAADcAD++/1QAA==';
});
});