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JS_ExecuteScriptVersion 编辑

Obsolete since JSAPI 36
This feature is obsolete.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

Execute a compiled script with specified version.

Syntax

JSBool
JS_ExecuteScriptVersion(JSContext *cx, JSObject *obj, JSObject *scriptObj,
    jsval *rval, JSVersion version);

Name	Type	Description
`cx`	`JSContext *`	The context in which to execute the script. Requires request. In a `JS_THREADSAFE` build, the caller must be in a request on this `JSContext`.
`obj`	`JSObject *`	The scope in which to execute the script. In the simplest cases, this should just be the embedding's global object. `obj` must not be an array, an E4X XML object, a With object, or a proxy. In ECMAScript terms, the script is executed in a new execution context, but that context is not initialized quite as described in any of the three cases in ECMA 262-3 §10.2. Instead: The scope chain is initialized to contain `obj`, followed by its `parent`, then its parent's parent, etc. until `NULL` is reached. Variable initialization is performed. If the `JSOPTION_VAROBJFIX` option is in effect (recommended), then the last object in the scope chain is used as the variable object. Otherwise `obj` is used. The `this` value is `obj`.
`script`	`JSObject *`	The compiled script to execute.
`rval`	`jsval *`	Out parameter. On success, `*rval` receives the value from the last executed expression statement processed in the script.
`version`	`JSVersion`	Version for the script.

Description

JS_ExecuteScript executes a previously-compiled script, script.

If the script executes successfully, *rval receives the value from the last executed expression statement processed in the script, and JS_ExecuteScript returns true. Otherwise it returns false, and the value left in *rval is unspecified.

To execute a script that has not been compiled, use JS::Evaluate instead.

JS_ExecuteScriptVersion 编辑

Syntax

Description

See Also

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友情链接

JS_ExecuteScriptVersion 编辑

Syntax

Description

See Also

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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。