JSON Edit History Manager for Undo / Redo Functionality, powered by operational transform. Keep state and support undo for anything that can be expressed / stored by JSON!
include required js file:
<script src="path-to-your-ctrlz-bundle.js"></script>
ctrlz uses @plotdb/json0 as a dependency. ctrlz.bundle.min.js already includes it but for a separate file, use ctrlz.mins.js instead, and include @plotdb/json0 separately downloaded from its repo.
/* init directly in constructor */
mananger = new ctrlz({obj: obj});
/* or alternatively, reset anytime after initialized */
manager.reset({obj: obj});
/* when obj is updated */
manager.update(obj);
/* if you have ot to apply: */
manager.apply({op: op});
/* undo, return a undo-ed object */
ret = manager.undo();
/* redo, return a redo-ed object */
ret = manager.redo();
/* clean history */
mananger.clear();
MIT.