# History

The `History` object contains the undo and redo history for the editor.

It can be accessed from an `Editor` instance as the property `history`.

This property is only available on the `Editor` if the editor was instantiated using the `withHistory` method which adds undo/redo functionality to the Slate editor.

```typescript
export interface History {
  redos: Batch[]
  undos: Batch[]
}

interface Batch {
  operations: Operation[]
  selectionBefore: Range | null
}
```

* [Static Methods](#static-methods)

## Static Methods

#### `History.isHistory(value: any): value is History`

Returns `true` if the passed in `value` is a `History` object and also acts as a type guard for `History`.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.slatejs.org/libraries/slate-history/history.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.