Batch (engine/model)



A batch instance groups model changes (operations). All operations grouped in a single batch can be reverted together, so you can also think about a batch as of a single undo step. If you want to extend a given undo step, you can add more changes to the batch using enqueueChange:

model.enqueueChange( batch, writer => {
	writer.insertText( 'foo', paragraph, 'end' );
} );



  • readonly

    baseVersion : null | number

    Returns the base version of this batch, which is equal to the base version of the first operation in the batch. If there are no operations in the batch or neither operation has the base version set, it returns null.

  • readonly

    isLocal : boolean

    Whether the batch includes operations created locally (true) or operations created on other, remote editors (false).

  • readonly

    isTyping : boolean

    Whether the batch includes operations connected with typing.

  • readonly

    isUndo : boolean

    Whether the batch was created by the undo feature and undoes other operations.

  • readonly

    isUndoable : boolean

    Whether the batch can be undone through the undo feature.

  • readonly

    operations : Array<Operation>

    An array of operations that compose this batch.

  • deprecated readonly

    type : 'default'

    The type of the batch.

    This property has been deprecated and is always set to the 'default' value.

    It can be one of the following values:

    • 'default' – All "normal" batches. This is the most commonly used type.
    • 'transparent' – A batch that should be ignored by other features, i.e. an initial batch or collaborative editing changes.


  • constructor( type )

    Creates a batch instance.


    type : BatchType

    A set of flags that specify the type of the batch. Batch type can alter how some of the features work when encountering a given Batch instance (for example, when a feature listens to applied operations).

    Defaults to {}


  • addOperation( operation ) → Operation

    Adds an operation to the batch instance.


    operation : Operation

    An operation to add.



    The added operation.