{"json_modified": "2016-03-28T08:41:29.139184", "uuid": "a35463ef-687b-40dd-ae6d-c039ee0d0f8e", "title": "JSNewEnumerateOp", "url": "/en-US/docs/Mozilla/Projects/SpiderMonkey/JSAPI_reference/JSNewEnumerateOp", "tags": ["R\u00e9f\u00e9rence", "Reference", "SpiderMonkey", "JSAPI Reference"], "translations": [], "modified": "2015-01-18T13:45:15", "label": "JSNewEnumerateOp", "localization_tags": [], "locale": "en-US", "id": 133115, "last_edit": "2015-01-18T13:45:04", "summary": "From SpiderMonkey 38, <strong><code>JSNewEnumerateOp</code></strong> is the type of <code>ObjectOps::enumerate</code>. This callback overrides a portion of SpiderMonkey's default <code>[[Enumerate]]</code> internal method. When an ordinary object is enumerated, that object and each object on its prototype chain is tested for an enumerate op, and those ops are called in order. The properties each op adds to the <code>properties</code> vector are added to the set of values the <code>for-in</code> loop will iterate over. All of this is nonstandard.", "sections": [{"id": "Quick_Links", "title": null}, {"id": "Syntax", "title": "Syntax"}, {"id": "Description", "title": "Description"}, {"id": "See_Also", "title": "See Also"}], "slug": "Mozilla/Projects/SpiderMonkey/JSAPI_reference/JSNewEnumerateOp", "review_tags": ["technical"]}