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+<!doctype html>
+<meta charset=utf-8>
+<title>IndexedDB: Special-cased identifiers in extracting keys from values (ES bindings)</title>
+<meta name="help" href="https://w3c.github.io/IndexedDB/#extract-key-from-value">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/support.js"></script>
+<script>
+
+[
+  {
+    type: 'String',
+    property: 'length',
+    instance: 'abc',
+  },
+  {
+    type: 'Array',
+    property: 'length',
+    instance: ['a', 'b', 'c'],
+  },
+  {
+    type: 'Blob',
+    property: 'size',
+    instance: new Blob(['abc']),
+  },
+  {
+    type: 'Blob',
+    property: 'type',
+    instance: new Blob([''], {type:'foo/bar'}),
+  },
+  {
+    type: 'File',
+    property: 'name',
+    instance: new File([''], 'foo'),
+  },
+  {
+    type: 'File',
+    property: 'lastModified',
+    instance: new File([''], '', {lastModified: 123}),
+  },
+].forEach(function(testcase) {
+  indexeddb_test(
+    (t, db) => {
+      db.createObjectStore(
+          'store', {autoIncrement: true, keyPath: testcase.property});
+    },
+    (t, db) => {
+      const key = testcase.instance[testcase.property];
+      const tx = db.transaction('store', 'readwrite', {durability: 'relaxed'});
+      tx.objectStore('store').put(testcase.instance);
+      const request = tx.objectStore('store').get(key);
+      request.onerror = t.unreached_func('request should not fail');
+      request.onsuccess = t.step_func(function() {
+        const result = request.result;
+        assert_key_equals(result[testcase.property], key,
+                          'Property should be used as key');
+      });
+      tx.oncomplete = t.step_func(function() {
+        t.done();
+      });
+    },
+    'Type: ' + testcase.type + ', identifier: ' + testcase.property
+  );
+});
+
+</script>