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JS_GetOwnPropertyDescriptor 编辑

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 desc); // Added in SpiderMonkey 45

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.

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.

JS_GetOwnPropertyDescriptor 编辑

Syntax

Description

See Also

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友情链接

JS_GetOwnPropertyDescriptor 编辑

Syntax

Description

See Also

如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

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友情链接

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