[API categories](API-categories.md) | [API index](API-index.md) # JavascriptCallback (object) You can pass a callback function from Javascript to Python, when you do that, what you get in Python is a `JavascriptCallback` object that you can use to call javascript function back. If you call the javascript callback and it fails, instead of js exception what you get is a python exception that exits the application by default (see sys.excepthook in examples). See also [JavascriptBindings](JavascriptBindings.md). See also [Issue #11](../issues/11) (Throw JS / Python exceptions according to execution context). Table of contents: * [Methods](#methods) * [Call](#call) * [GetFrame](#getframe) * [GetId](#getid) * [GetFunctionName](#getfunctionname) ## Methods ### Call | Parameter | Type | | --- | --- | | [params..] (optional) | mixed | | __Return__ | void | Call the javascript callback function. Pass arguments optionally. For a list of allowed types for `mixed` see JavascriptBindings.[IsValueAllowed()](JavascriptBindings.md#isvalueallowed). ### GetFrame | | | | --- | --- | | __Return__ | [Frame](Frame.md) | Get Frame object associated with this callback. If Browser was destroyed then Frame may be None. ### GetId | | | | --- | --- | | __Return__ | int | Get this callback's identifier. ### GetFunctionName | | | | --- | --- | | __Return__ | string | Get the javascript function's name. If that is an anonymous function you will get some random name like "É☺«".