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persist webp test result

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ed 2021-10-24 00:23:51 +02:00
parent ed8fff8c52
commit 71b478e6e2
1 changed files with 6 additions and 1 deletions
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7
copyparty/web/browser.js
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@ -268,14 +268,19 @@ function goto(dest) {
}
var have_webp = null;
var have_webp = sread('have_webp');
(function () {
if (have_webp !== null)
return;
var img = new Image();
img.onload = function () {
have_webp = img.width > 0 && img.height > 0;
swrite('have_webp', 'ya');
};
img.onerror = function () {
have_webp = false;
swrite('have_webp', '');
};
img.src = "data:image/webp;base64,UklGRhoAAABXRUJQVlA4TA0AAAAvAAAAEAcQERGIiP4HAA==";
})();