Immutable removal of keys from a javascript object using ES6 deconstructing.

isolateKeys.js

//Avoid annoying immutability bugs by using this nice ES6 deconstructing trick to keep your object immutable.

// example obj
const someObj = {
  want: 'this',
  need: 'that',
  dont: 'wantthis',
  forget: 'this'
};

const isolateKeys = (object) => {
  // deconstruct the keys you dont want, everything you want will be in the the rest variable.
  const { dont, forget, ...rest } = object

  return rest
}

const keysThatIWant = isolateKeys(someObj) 

// Returns: 
// {
//   want: 'this',
//   need: 'that'
// }