blockly > Events > BlockChange

Events.BlockChange class

Notifies listeners when some element of a block has changed (e.g. field values, comments, etc).

Signature:

export declare class BlockChange extends BlockBase 

Extends: BlockBase

Constructors

Constructor	Modifiers	Description
(constructor)(opt_block, opt_element, opt_name, opt_oldValue, opt_newValue)		Constructs a new instance of the BlockChange class

Properties

Property	Modifiers	Type	Description
element?		string	(Optional) The element that changed; one of 'field', 'comment', 'collapsed', 'disabled', 'inline', or 'mutation'
name?		string	(Optional) The name of the field that changed, if this is a change to a field.
newValue		unknown	The new value of the element.
oldValue		unknown	The original value of the element.
type		EventType

Methods

Method	Modifiers	Description
isNull()		Does this event record any change of state?
run(forward)		Run a change event.
setDisabledReason(disabledReason)		Set the language-neutral identifier for the reason why the block was or was not disabled. This is only valid for events where element is 'disabled'. Defaults to 'MANUALLY_DISABLED'.
toJson()		Encode the event as JSON.