Introduced in JavaScript 31
Get a detailed description of that property.
Syntax
bool
JS_GetOwnPropertyDescriptor(JSContext *cx, JS::HandleObject obj, const char *name,
JS::MutableHandle<JSPropertyDescriptor> desc);
bool
JS_GetOwnPropertyDescriptorById(JSContext *cx, JS::HandleObject obj, JS::HandleId id,
JS::MutableHandle<JSPropertyDescriptor> desc);
bool
JS_GetOwnUCPropertyDescriptor(JSContext *cx, JS::HandleObject obj, const char16_t *name,
JS::MutableHandle<jspropertydescriptor> desc); // Added in SpiderMonkey 45
</jspropertydescriptor>
| Name | Type | Description |
|---|---|---|
cx |
JSContext * |
A context. Requires request. In a JS_THREADSAFE build, the caller must be in a request on this JSContext. |
obj |
JS::HandleObject |
The object to search for the property. |
id |
const char * or JS::HandleId or const char16_t |
The name of the property to look up. |
desc |
JS::MutableHandle<JSPropertyDescriptor> |
Out parameter. On success, if no property is found, desc->obj is set to NULL. If a property is found, *desc receives a description of it. |
Description
JS_GetOwnPropertyDescriptor and JS_GetOwnPropertyDescriptorById get a detailed description of that property (returned in desc->obj). If desc->obj is null, then this property was not found on the prototype chain.