Skip to content

chore(playground): keep loading grammars when Cache Storage refuses #43

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
maxgfr merged 1 commit into from
Nov 2, 2026
Merged

chore(playground): keep loading grammars when Cache Storage refuses #43

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
9 changes: 6 additions & 3 deletions site/playground/worker.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -58,12 +58,15 @@ async function fetchWasm(name) {
const url = new URL(`./grammars/${name}`, self.location.href).href;
// Cached so a second repo — and every reload — skips the download entirely.
// Grammar wasm is immutable per release, so there is nothing to invalidate.
const cache = self.caches ? await caches.open(GRAMMAR_CACHE) : null;
const hit = cache ? await cache.match(url) : null;
// The cache is best effort: maxgfr.github.io is one origin shared by many
// sites, so its quota can be full, and private windows may refuse Cache
// Storage outright. Either way the grammar still loads from the network.
const cache = self.caches ? await caches.open(GRAMMAR_CACHE).catch(() => null) : null;
const hit = cache ? await cache.match(url).catch(() => undefined) : undefined;
if (hit) return new Uint8Array(await hit.arrayBuffer());
const response = await fetch(url);
if (!response.ok) throw new Error(`grammar ${name}: HTTP ${response.status}`);
if (cache) await cache.put(url, response.clone());
if (cache) await cache.put(url, response.clone()).catch(() => {});
return new Uint8Array(await response.arrayBuffer());
}

Expand Down
Loading