https://www.convertsimple.com/wp-content/uploads/2022/03/heifconvert.js?v=

1importScripts("/wp-content/uploads/2022/03/heic-convert-lib.js");
2
3async function goConvert(file, fileNameNoExtension, rowId, from, to, options) {
4	sendStatusUpdate(rowId, "Converting file...", "PROCESSING");
5
6	try {
7		var outputFileNameWithExtension = fileNameNoExtension + "." + to;
8
9		var fileReader = new FileReader();
10		fileReader.onload = async function() {
11			var result = fileReader.result;
12
13			var format = 'JPEG';
14			if (to === 'png') format = 'PNG';
15
16			const outputBuffer = await heicconvert({
17				buffer: result,
18				format: format,
19				quality: 1
20			});
21
22			var contentType = extensionToContentType[to];
23			var outputBlob = new Blob([outputBuffer], {type: contentType});
24
25			sendCompletedFile(rowId, outputBlob, outputFileNameWithExtension, to);
26		};
27		fileReader.readAsArrayBuffer(file);
28
29	} catch (err) {
30		console.log(err);
31		sendStatusUpdate(rowId, "Conversion error.", "ERROR");
32	}
33}