<!doctype html> <meta charset=utf-8> <title>IndexedDB: Detached buffers supplied as binary keys</title> <meta name="help" href="http://w3c.github.io/IndexedDB/#convert-a-value-to-a-key"> <meta name="help" href="https://webidl.spec.whatwg.org/#dfn-get-buffer-source-copy"> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <script src="resources/support.js"></script> <script> indexeddb_test( (t, db) => { db.createObjectStore('store'); }, (t, db) => { const tx = db.transaction('store', 'readwrite', {durability: 'relaxed'}); const store = tx.objectStore('store'); const array = new Uint8Array([1,2,3,4]); const buffer = array.buffer; assert_equals(array.byteLength, 4); // Detach the ArrayBuffer by transferring it to a worker. const worker = new Worker(URL.createObjectURL(new Blob([]))); worker.postMessage('', [buffer]); assert_equals(array.byteLength, 0); assert_throws_js(TypeError, () => { store.put('', buffer); }); t.done(); }, 'Detached ArrayBuffer' ); indexeddb_test( (t, db) => { db.createObjectStore('store'); }, (t, db) => { const tx = db.transaction('store', 'readwrite', {durability: 'relaxed'}); const store = tx.objectStore('store'); const array = new Uint8Array([1,2,3,4]); assert_equals(array.length, 4); // Detach the ArrayBuffer by transferring it to a worker. const worker = new Worker(URL.createObjectURL(new Blob([]))); worker.postMessage('', [array.buffer]); assert_equals(array.length, 0); assert_throws_js(TypeError, () => { store.put('', array); }); t.done(); }, 'Detached TypedArray' ); </script>