undo-canvas
Add undo/redo functions to CanvasRenderingContext2D
<script src="https://cdn.rawgit.com/magicien/undo-canvas/v0.1.3/undo-canvas.js"></script>
<script>
const canvas = document.createElement('canvas')
const context = canvas.getContext('2d')
UndoCanvas.enableUndo(context)
context.strokeStyle = '#ff0000'
context.beginPath()
context.moveTo(0, 0)
context.lineTo(30, 30)
context.closePath()
context.stroke()
context.undo() // erase the line
context.redo() // redraw the line
UndoCanvas.disableUndo(context)
</script>
Install
Node
npm install --save undo-canvas
Browser
<script src="https://cdn.rawgit.com/magicien/undo-canvas/v0.1.3/undo-canvas.js"></script>