immutable-obj-history.js

// Welcome! require() some modules from npm (like you were using browserify)
// and then hit Run Code to run your code on the right side.
// Modules get downloaded from browserify-cdn and bundled in your browser.

var Immutable = require('immutable');

const b = new Immutable.Record({
  id: null,
  name: null,
});

const newB = new b();

console.log(newB.toJS());

const newA = newB.set('id', 10);

console.log(newA.toJS());
console.log(newB.toJS());


const wrapper = (immutableData) => {
 	const history = [immutableData];
  let currentVal = immutableData;
  return {
  history,
    update: (fn) => {
			const newVal = fn(currentVal);
      history.push(newVal);
      currentVal = newVal;
  return this;
  	},
    toJS: () => currentVal.toJS()
  }
};
  

const myData = wrapper(newA);

state.update(record => {
  return record.set('id', 100);
});

console.log(myData.toJS());
console.log(myData.history);