Get the Corresponding Context

Extensible events and operations of UEF are supported on top of contexts like GlobalContext, TabContext, and RecordContext.

The following diagram details the hierarchy of these contexts that are maintained in UEF and the supported events, actions, and APIs supported in each context.

First, here's how you get the various contexts:

const globalContext: IGlobalContext = await frameworkProvider.getGlobalContext();
const tabContext: ITabContext = await  frameworkProvider.getTabContext(browserTabId);
const availableRecords: IRecordContext[] = await frameworkProvider.getAvailableRecords();

The following graphic illustrates the global context:

And this graphic shows the overall architecture:

<INSERT 2 GRAPHICS--UEF_Global_context AND UEF_diagram

Here's a table explaining the context types:

Context Type	Support Events	Support Operations	Syntax
GlobalContext	TabOpen, TabClose, TabChange	PopOperation, InvokeServiceConnection	getGlobalContext(): Promise<IGlobalContext>;
TabContext	ContextOpen, ContextClose	FocusTab, CloseTab	getTabContext(browserTabId?: string): Promise<ITabContext>;
RecordContext	FieldValueChange, OnBeforeSave(Controllable Event), OnAfterSave, OnDataLoad	GetFieldValue, SaveRecord, SetFieldValue	getAvailableRecords(tabId?: string): Promise<IRecordContext[]>;

Note: The OnBeforeSave (in Record Context) event is fired before firing the REST API that commits the data into the server. End-users can do asynchronous operations in this callback, or they can cancel this event. This event can wait for an asynchronous operation to be completed.