Obsolete since JSAPI 37
This feature is obsolete.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.
Introduced in JavaScript 1.8.5
Returns the callback currently configured to be called when JavaScript functions are invoked or exited, as established by a prior call to JS_SetFunctionCallback.
 Note: This method is only available if 
MOZ_TRACE_JSCALLS was defined at compile time using --enable-trace-jscalls.Syntax
JSFunctionCallback JS_GetFunctionCallback(JSContext *cx);
| Name | Type | Description | 
|---|---|---|
| cx | JSContext * | Pointer to a JS context from which to derive runtime information. Requires request. In a JS_THREADSAFEbuild, the caller must be in a request on thisJSContext. | 
Description
JS_GetFunctionCallback returns the current function invocation callback, or NULL if there isn't one set up.