object-rollback

Cancel changes to JavaScript object values (add/update/delete properties, add item into Map/Set, etc.)

Install

npm install object-rollback

Usage

const { ObjectState } = require('object-rollback');

const someValue = {
  a: 1,
  b: 2,
  c: [ 1, 2, 3 ],
};

console.log(someValue); // { a: 1, b: 2, c: [ 1, 2, 3 ] }

const state = new ObjectState(someValue);

someValue.b = 200;
someValue.x = 42;
someValue.c.push(9);

console.log(someValue); // { a: 1, b: 200, c: [ 1, 2, 3, 9 ], x: 42 }

state.rollback();

console.log(someValue); // { a: 1, b: 2, c: [ 1, 2, 3 ] }

Tested objects

Standard Built-in ECMAScript 2019 Objects

• Error - test code
  • Error
  • EvalError
  • RangeError
  • ReferenceError
  • SyntaxError
  • TypeError
  • URIError
• Date - test code
• RegExp - test code
• Array - test code
• Map - test code
• Set - test code
• TypedArray - test code
  • Int8Array
  • Uint8Array
  • Uint8ClampedArray
  • Int16Array
  • Uint16Array
  • Int32Array
  • Uint32Array
  • BigInt64Array
  • BigUint64Array
  • Float32Array
  • Float64Array
• DataView - test code

Node.js Built-in Objects

• Buffer - test code
• URL - test code

Tests

To run the test suite, first install the dependencies, then run npm test:

npm install
npm test

Contributing

see CONTRIBUTING.md