ExpressionController interface

@microsoft/fast-element > ExpressionController

ExpressionController interface

Controls the lifecycle of an expression and provides relevant context.

Signature:

export interface ExpressionController<TSource = any, TParent = any> 

Properties

Property	Modifiers	Type	Description
context	readonly	ExecutionContext<TParent>	The context the expression is evaluated against.
isBound	readonly	boolean	Indicates whether the controller is bound.
source	readonly	TSource	The source the expression is evaluated against.
sourceLifetime?	readonly	SourceLifetime	(Optional) Indicates how the source's lifetime relates to the controller's lifetime.

Methods

Method	Description
onUnbind(behavior)	Registers an unbind handler with the controller.