Travels

Judgement

What it is

Building block

What it does

A framework-agnostic undo and redo library that stores history as JSON patches, suited to large state with small changes.

Adopt it when

You are adding undo and redo to an editor, drawing tool or form builder in JavaScript.

Watch out

About a year old, and its time-tracking topic tag is misleading.

Ready for

Usable

Runs as

Library

Built with

TypeScript and Mutative

How established

Young: started 13 months ago, latest release v3.0.1.

What the license allows

You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-03 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: Travels → TypeScript → Go → runs on a microchip

How compilers were built, back to punched paper tape

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