deepCopy.js

/**
 * check if vals are objects
 * if so. copy that object (deep copy)
 * else return the value
 */

function deepCopy(obj) {
  const keys = Object.keys(obj);
  const newObject = {};
  for (let i = 0; i < keys.length; i++) {
    const key = keys[i];
    if (typeof obj[key] === 'object') {
      newObject[key] = deepCopy(obj[key]);
    } else {
      newObject[key] = obj[key];
    }
  }
  return newObject;
}

const x = {a: 1, b: 2, c: {a: 1}};

const y = deepCopy(x);
y.c.b = 2;

console.log('x:', x);
console.log('y:', y);

// https://medium.com/@tkssharma/objects-in-javascript-object-assign-deep-copy-64106c9aefab