slate/examples/history/value.json

{
  "document": {
    "nodes": [
      {
        "object": "block",
        "type": "paragraph",
        "nodes": [
          {
            "object": "text",
            "leaves": [
              {
                "text": "Slate editors save all changes to an internal \"history\" automatically, so you don't need to implement undo/redo yourself. And the editor automatically binds to the browser's default undo/redo keyboard shortcuts."
              }
            ]
          }
        ]
      },
      {
        "object": "block",
        "type": "paragraph",
        "nodes": [
          {
            "object": "text",
            "leaves": [
              {
                "text": "Try it out for yourself! Make any changes you'd like then press \"cmd+z\"."
              }
            ]
          }
        ]
      }
    ]
  }
}