Simple and robust CoffeeScript/JavaScript library for undo/redo features on plain state object. Full test coverage and it is using on production as well.
npm install undo-redoerUndoRedoer = require './UndoRedoer'
# initiate some example state object
state =
meta:
description: "state object can be recursive as well"
removeMe: "I will be removed"
id: "unique-id"
x: 0
y: 0
ur = new UndoRedoer state
# push some change
ur.pushChanges
x: 1
y: 2
# remove something
ur.pushChanges
meta:
removeMe: undefined
# whoops
ur.pushChanges
x: undefined
backDiff = ur.undo() # backDiff now contains reverse change { x:1 }
console.log "\nbackDiff:"
console.dir backDiff # output to console
console.log "\nstate:"
console.dir ur.state # check undo'ed stateabove example outputs:
backDiff:
{ x: 1 }
state:
{ meta: { description: 'state object can be recursive as well' },
id: 'unique-id',
y: 2,
x: 1 }
npm intall --dev
npm test(The MIT License)
Copyright (c) 2008-2013 Se7enSky studio <info@se7ensky.com>
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