undo-redoer

Simple and robust CoffeeScript/JavaScript library for undo/redo features on plain state object. Full test coverage. For Node.JS and Browser (with AMD support).

UndoRedoer

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-redoer
UndoRedoer = 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 state 

above 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>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

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