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blockly > Workspace > addChangeListener

Workspace.addChangeListener() method​

When something in this workspace changes, call a function. Note that there may be a few recent events already on the stack. Thus the new change listener might be called with events that occurred a few milliseconds before the change listener was added.

Signature:

addChangeListener(func: (e: Abstract) => void): (e: Abstract) => void;

Parameters​

Parameter

Type

Description

func

(e: Abstract) => void

Function to call.

Returns:

(e: Abstract) => void

Obsolete return value, ignore.