JavaScript Clone Object

index.js

// Author: Mitch Allen
// Project: js-clone
// File: index.js

// 1. Define a nicer log function
let stringify = (obj) => console.log(JSON.stringify(obj,null,2));

// 2. Define a source object
let alpha = { name: "Alpha", value: 100 };

// 3. Attempt to clone a target object using assignment
let beta = alpha;

// 4. Try to change the name of the target object
beta.name = "Beta";

// 5. Log the result
stringify([ alpha, beta ]);

// Notice that alpha.name is now the same as beta;
// Both the target and the source point to the same object

// 6. Define a new source object
let gamma = { name: "Gamma", value: 200 };

// 7. Clone a new target object from the new source object using the spread operator
let delta = { ...gamma };

// 8.  Change the name of the new target object 
delta.name = "Delta";

// 9. Log the result
stringify([ gamma, delta ]);

// Note that changes to the target (delta) do not change the source
// They are independent objects

package.json

{
  "name": "js-clone",
  "version": "1.0.0",
  "description": "JavaScript clone object example",
  "type": "module",
  "main": "index.js",
  "scripts": {
    "start": "node index.js"
  },
  "keywords": ["javascript", "clone", "spread"],
  "author": "Mitch Allen",
  "license": "MIT"
}