# UndoManager
This module allows to manage the stack of changes applied in canvas. Once the editor is instantiated you can use its API. Before using these methods you should get the module from the instance
const um = editor.UndoManager;
# getConfig
Get configuration object
Returns Object (opens new window)
# add
Add an entity (Model/Collection) to track Note: New Components and CSSRules will be added automatically
# Parameters
entity(Model | Collection) Entity to track
# Examples
um.add(someModelOrCollection);
Returns this
# remove
Remove and stop tracking the entity (Model/Collection)
# Parameters
entity(Model | Collection) Entity to remove
# Examples
um.remove(someModelOrCollection);
Returns this
# removeAll
Remove all entities
# Examples
um.removeAll();
Returns this
# start
Start/resume tracking changes
# Examples
um.start();
Returns this
# stop
Stop tracking changes
# Examples
um.stop();
Returns this
# undo
Undo last change
# Parameters
all(optional, defaulttrue)
# Examples
um.undo();
Returns this
# undoAll
Undo all changes
# Examples
um.undoAll();
Returns this
# redo
Redo last change
# Parameters
all(optional, defaulttrue)
# Examples
um.redo();
Returns this
# redoAll
Redo all changes
# Examples
um.redoAll();
Returns this
# hasUndo
Checks if exists an available undo
# Examples
um.hasUndo();
Returns Boolean (opens new window)
# hasRedo
Checks if exists an available redo
# Examples
um.hasRedo();
Returns Boolean (opens new window)
# isRegistered
Check if the entity (Model/Collection) to tracked Note: New Components and CSSRules will be added automatically
# Parameters
objanyentity(Model | Collection) Entity to track
Returns Boolean (opens new window)
# getStack
Get stack of changes
# Examples
const stack = um.getStack();
stack.each(item => ...);
Returns Collection
# clear
Clear the stack
# Examples
um.clear();
Returns this