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JS_GetPropertyDescriptor 编辑

Finds a specified property of an object and gets a detailed description of that property.

Syntax

bool
JS_GetPropertyDescriptor(JSContext *cx, JS::HandleObject obj, const char *name,
                         JS::MutableHandle<JSPropertyDescriptor> desc); // Added in SpiderMonkey 31

bool
JS_GetPropertyDescriptorById(JSContext *cx, JS::HandleObject obj, JS::HandleId id,
                             JS::MutableHandle<JSPropertyDescriptor> desc);

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`	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_GetPropertyDescriptor and JS_GetPropertyDescriptorById find a specified property of an object and gets a detailed description of that property on the prototype chain (returned in desc->obj). If desc->obj is null, then this property was not found on the prototype chain.

JS_GetPropertyDescriptor 编辑

Syntax

Description

See also

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友情链接

JS_GetPropertyDescriptor 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

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。