Add support for undo/redo

toolness / p5.js-widget

A reusable widget for embedding editable p5 sketches in web pages.

https://toolness.github.io/p5.js-widget/

GNU Lesser General Public License v2.1

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Closed toolness closed 8 years ago

toolness commented 8 years ago

undo-redo

This fixes #32.

The buttons only appear if there is actually history available to undo/redo.