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JS_ExecuteScript 编辑

Execute a compiled script.

Syntax

bool
JS_ExecuteScript(JSContext *cx, JS::HandleScript script,
                 JS::MutableHandleValue rval); // Added in SpiderMonkey 45

bool
JS_ExecuteScript(JSContext *cx, JS::HandleScript script); // Added in SpiderMonkey 45

bool
JS_ExecuteScript(JSContext *cx, JS::AutoObjectVector &scopeChain,
                 JS::HandleScript script, JS::MutableHandleValue rval); // Added in SpiderMonkey 36

bool
JS_ExecuteScript(JSContext *cx, JS::AutoObjectVector &scopeChain,
                 JS::HandleScript script); // Added in SpiderMonkey 36

bool
JS_ExecuteScript(JSContext *cx, JS::HandleObject obj, JS::HandleScript script,
                 JS::MutableHandleValue rval); // Obsolete since JSAPI 39

bool
JS_ExecuteScript(JSContext *cx, JS::HandleObject obj, JS::HandleScript script); // Obsolete since JSAPI 39

bool
JS::CloneAndExecuteScript(JSContext *cx, JS::Handle<JSScript*> script); // Added in SpiderMonkey 45

bool
JS::CloneAndExecuteScript(JSContext *cx, JS::Handle<JSObject*> obj,
                          JS::Handle<JSScript*> script); // Added in SpiderMonkey 31, obsoleted since JSAPI 39

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`	`JS::HandleObject`	The scope in which to execute the script. In the simplest cases, this should just be the embedding's global object. Obsolete since JSAPI 39 `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`.
`scopeChain`	`JS::AutoObjectVector &`	An explicit scope chain. `scopeChain` must not include the global object on it; that's implicit. It needs to contain the other objects that should end up on the scripts's scope chain. Objects in the vector should be ordered from inner to the outer scope.
`script`	`JS::HandleScript`	The compiled script to execute.
`rval`	`JS::MutableHandleValue`	Out parameter. On success, `rval` receives the value from the last executed expression statement processed in the script.

Description

JS_ExecuteScript executes a previously-compiled script, script.

JS::CloneAndExecuteScript handles a cross-compartment script. If the script is cross-compartment, it is cloned into the current compartment before executing.

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.

The JSAPI User Guide contains example code using compiled scripts.

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

JS_ExecuteScript 编辑

Syntax

Description

See Also

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友情链接

JS_ExecuteScript 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。