<!doctype html> <meta charset=utf-8> <title>IndexedDB: ES bindings - Inject a key into a value - Values bypass setters</title> <meta name="help" href="https://w3c.github.io/IndexedDB/#inject-key-into-value-values-bypass-setters"> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <script src="resources/support-promises.js"></script> <script> promise_test(async t => { const db = await createDatabase(t, db => { db.createObjectStore('store', {autoIncrement: true, keyPath: 'id'}); }); let setter_called = false; Object.defineProperty(Object.prototype, 'id', { configurable: true, set: value => { setter_called = true; }, }); t.add_cleanup(() => { delete Object.prototype['id']; }); const tx = db.transaction('store', 'readwrite', {durability: 'relaxed'}); tx.objectStore('store').put({}); const result = await promiseForRequest(t, tx.objectStore('store').get(1)); assert_false(setter_called, 'Setter should not be called for key result.'); assert_true(result.hasOwnProperty('id'), 'Result should have own-property overriding prototype setter.'); assert_equals(result.id, 1, 'Own property should match primary key generator value'); }, 'Returning values to script should bypass prototype setters'); </script>