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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.