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Avoid flash of no background when switching background images

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This commit is contained in:
Jordan Eldredge 2019-10-22 16:32:43 -07:00
parent ac2f80cc0c
commit a1139ec371
1 changed files with 12 additions and 1 deletions
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13
modern/src/utils.ts
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@ -351,7 +351,18 @@ export function findXmlElementById(
// This is intentionally async since we may want to sub it out for an async
// function in a node environment
export async function getUrlFromBlob(blob: Blob): Promise<string> {
return URL.createObjectURL(blob);
// We initiallay used `URL.createObjectURL(blob)` here, but it had an issue
// where, when used as a background imaged, they would take more than one
// frame to load resulting in a white flash when switching background iamges.
return new Promise((resolve, reject) => {
const reader = new FileReader();
reader.onload = function(e) {
// @ts-ignore This API is not very type-friendly.
resolve(e.target.result);
};
reader.onerror = reject;
reader.readAsDataURL(blob);
});
}
async function loadImage(