# NoOperation

class

Operation which is doing nothing ("empty operation", "do-nothing operation", "noop"). This is an operation, which when executed does not change the tree model. It still has some parameters defined for transformation purposes.

In most cases this operation is a result of transforming operations. When transformation returns [`NoOperation`](module_engine_model_operation_nooperation-NoOperation.md) it means that changes done by the transformed operation have already been applied.

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/model/operation/nooperation.ts#L21)

<a id="properties">

## Properties

<a id="member-affectedSelectable">

### `affectedSelectable: ModelSelectable` _(readonly)_

A selectable that will be affected by the operation after it is executed.

The exact returned parameter differs between operation types.

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/model/operation/nooperation.ts#L29)

<a id="member-baseVersion">

### `baseVersion: number | null` _(inherited)_

[`version`](module_engine_model_document-ModelDocument.md#member-version) on which operation can be applied. If you try to [apply](module_engine_model_model-Model.md#function-applyOperation) operation with different base version than the [document version](module_engine_model_document-ModelDocument.md#member-version) the [model-document-applyOperation-wrong-version](module_utils_ckeditorerror-CKEditorError.md) error is thrown.

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/model/operation/operation.ts#L26)

<a id="member-batch">

### `batch: Batch | null` _(inherited)_

[Batch](module_engine_model_batch-Batch.md) to which the operation is added or `null` if the operation is not added to any batch yet.

Note, that a [non-document operation](#member-isDocumentOperation) has this property always set to `null`, and is never added to any batch.

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/model/operation/operation.ts#L40)

<a id="member-isDocumentOperation">

### `isDocumentOperation: boolean` _(readonly)_

Defines whether operation is executed on attached or detached [items](module_engine_model_item-ModelItem.md).

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/model/operation/operation.ts#L31)

<a id="member-type">

### `type: 'noop'` _(readonly)_

Operation type.

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/model/operation/nooperation.ts#L22)

#### Static properties

<a id="static-member-className">

### `className: string` _(readonly)_

Name of the operation class used for serialization.

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/model/operation/nooperation.ts#L54)

<a id="methods">

## Methods

<a id="function-constructor">

### `constructor( baseVersion )` _(inherited)_

Base operation constructor.

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/model/operation/operation.ts#L53)

#### Parameters

* `baseVersion: number | null`

  Document [`version`](module_engine_model_document-ModelDocument.md#member-version) on which operation can be applied or `null` if the operation operates on detached (non-document) tree.

<a id="function-clone">

### `clone() → NoOperation`

Creates and returns an operation that has the same parameters as this operation.

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/model/operation/nooperation.ts#L36)

#### Returns

* `NoOperation`

<a id="function-getReversed">

### `getReversed() → Operation`

See [`Operation#getReversed()`](module_engine_model_operation_operation-Operation.md#function-getReversed).

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/model/operation/nooperation.ts#L43)

#### Returns

* `Operation`

<a id="function-toJSON">

### `toJSON() → unknown` _(inherited)_

Custom toJSON method to solve child-parent circular dependencies.

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/model/operation/operation.ts#L107)

#### Returns

* `unknown`

  Clone of this object with the operation property replaced with string.

<a id="function-_execute">

### `_execute() → void` _(internal)_

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/model/operation/nooperation.ts#L48)

#### Returns

* `void`

<a id="function-_validate">

### `_validate() → void` _(internal)_

Checks whether the operation's parameters are correct and the operation can be correctly executed. Throws an error if operation is not valid.

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/model/operation/operation.ts#L99)

#### Returns

* `void`

#### Static methods

<a id="static-function-fromJSON">

### `fromJSON( json, document ) → Operation` _(inherited)_

Creates `Operation` object from deserialized object, i.e. from parsed JSON string.

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/model/operation/operation.ts#L136)

#### Parameters

* `json: any`

  Deserialized JSON object.

* `document: ModelDocument`

  Document on which this operation will be applied.

#### Returns

* `Operation`

---

Full index of the CKEditor 5 API reference: [llms.txt](llms.txt)