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Fix WasmFS Fetch backend #25407

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Merged
merged 1 commit into from
Sep 29, 2025
Merged

Fix WasmFS Fetch backend #25407

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6 changes: 6 additions & 0 deletions src/lib/libwasmfs_fetch.js
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Original file line number Diff line number Diff line change
Expand Up @@ -95,7 +95,13 @@ addToLibrary({
if (!response.ok) {
throw response;
}
#if MIN_FIREFOX_VERSION < 128 || MIN_CHROME_VERSION < 132 || MIN_SAFARI_VERSION < 180000 || MIN_NODE_VERSION < 220300
// Use the old .arrayBuffer() method when targeting old environments.
var bytes = new Uint8Array(await response['arrayBuffer']());
#else
// Use the new .bytes() method to save a bit of code size when all target environments have it. https://developer.mozilla.org/en-US/docs/Web/API/Response/bytes
var bytes = await response['bytes']();
#endif
for (i = firstChunk; i <= lastChunk; i++) {
wasmFS$JSMemoryRanges[file].chunks[i] = bytes.slice(i*chunkSize-start,(i+1)*chunkSize-start);
}
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