{"json_modified": "2016-03-28T07:58:53.411139", "uuid": "d5e01f93-67d8-427a-85bb-60292813d15d", "title": "JS_IsConstructing_PossiblyWithGivenThisObject", "url": "/en-US/docs/Mozilla/Projects/SpiderMonkey/JSAPI_reference/JS_IsConstructing_PossiblyWithGivenThisObject", "tags": ["JSAPI", "Obsolete", "Reference", "SpiderMonkey", "JSAPI Reference", "R\u00e9f\u00e9rence"], "translations": [], "modified": "2015-10-03T16:13:48", "label": "JS_IsConstructing_PossiblyWithGivenThisObject", "localization_tags": [], "locale": "en-US", "id": 5205, "last_edit": "2015-10-03T16:13:40", "summary": "In the case of a constructor called from <a href=\"/en-US/docs/Mozilla/Projects/SpiderMonkey/JSAPI_reference/JS_ConstructObject\" title=\"JS_ConstructObject creates a new object of the specified class, with the specified prototype and parent, then invokes a constructor function to initialize the new object. cx is a pointer to a context associated with the runtime in which to create the new object. clasp is a pointer to the class of object to create. proto and parent may specify objects to be used as the new object's prototype and parent. If either is NULL, the engine tries to find reasonable defaults.\"><code>JS_ConstructObject</code></a> and <a href=\"/en-US/docs/Mozilla/Projects/SpiderMonkey/JSAPI_reference/JS_InitClass\" title=\"JS_InitClass initializes a JSClass and (optionally) makes it visible to JavaScript code.\"><code>JS_InitClass</code></a> where the class has the <a href=\"/en-US/docs/Mozilla/Projects/SpiderMonkey/JSAPI_reference/JSClass.flags#JSCLASS_CONSTRUCT_PROTOTYPE\" title=\"The flags field is of type uint32_t. Its value is the logical OR of zero or more of the following constants:\"><code>JSCLASS_CONSTRUCT_PROTOTYPE</code></a> flag set, SpiderMonkey passes the constructor a non-standard <code>this</code> object. In such cases, the following example would provide the additional information of whether a special <code>this</code> was supplied.", "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/JS_IsConstructing_PossiblyWithGivenThisObject", "review_tags": ["technical"]}