当前位置：文江博客知识库 en-US 文档 Mozilla Projects SpiderMonkey JSAPI_Reference JS_DefineOwnProperty

JS_DefineOwnProperty 编辑

Obsolete since JSAPI 33
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

This article covers features introduced in SpiderMonkey 1.8.5

Please provide a description for this function.

Syntax

bool
JS_DefineOwnProperty(JSContext *cx, JS::HandleObject obj, JS::HandleId id,
                     JS::HandleValue descriptor, bool *bp);

Name	Type	Description
`cx`	`JSContext *`	The context. Requires request. In a `JS_THREADSAFE` build, the caller must be in a request on this `JSContext`.
`obj`	`JS::HandleObject`	Object on which the property should be defined own.
`id`	`JS::HandleId`	The jsid of the property that should be defined.
`descriptor`	`JS::HandleValue`	This should be an jsval consisting of an object interpretable as property descriptor.
`bp`	`bool *`	`true` if successful.

JS_DefineOwnProperty implements the ECMAScript defined function Object.defineProperty. So the same restrictions apply as for that function (e.g. it is not possible to change a non-configurable property).

descriptor is supposed to be a property descriptor, this means you need to create an object with properties such as value, writable, get or set. See Object.defineProperty for a list of possible fields. A getter or setter defined with this functions will be observable from JS code.

JS_DefineOwnProperty 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。

发布评论

词条统计

友情链接

JS_DefineOwnProperty 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。

发布评论

词条统计

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。