Returns undefined until a thumbnail is available. On resolution, returns an object
URL that is automatically revoked when the component unmounts or the file changes.
Cache hits are returned from IndexedDB without running any generator.
Cache misses pick the first matching generator and queue its work so only one
generator runs at a time across all hook instances.
Resolve a thumbnail URL for a file.
Returns
undefineduntil a thumbnail is available. On resolution, returns an object URL that is automatically revoked when the component unmounts or the file changes.