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Use object URLs to load Files in to images

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Fixes https://github.com/vector-im/riot-web/issues/5326
This commit is contained in:
David Baker
2017-10-19 17:16:52 +01:00
parent 0f4ca1992d
commit b74ad8634b
1 changed files with 7 additions and 13 deletions
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12
src/ContentMessages.js
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@@ -99,23 +99,17 @@ function loadImageElement(imageFile) {
// Load the file into an html element // Load the file into an html element
const img = document.createElement("img"); const img = document.createElement("img");
const objectUrl = URL.createObjectURL(imageFile);
const reader = new FileReader(); img.src = objectUrl;
reader.onload = function(e) {
img.src = e.target.result;
// Once ready, create a thumbnail // Once ready, create a thumbnail
img.onload = function() { img.onload = function() {
URL.revokeObjectURL(objectUrl);
deferred.resolve(img); deferred.resolve(img);
}; };
img.onerror = function(e) { img.onerror = function(e) {
deferred.reject(e); deferred.reject(e);
}; };
};
reader.onerror = function(e) {
deferred.reject(e);
};
reader.readAsDataURL(imageFile);
return deferred.promise; return deferred.promise;
} }