Javascript clone object

How to do a shallow or deep clone of an Javascript Object using JS ES5, JS ES6 or Lodash. Please note that in the shallow copy the nested properties are just copied by reference.

• Javascript ES5 JSON.stringify()Deep Clone

  Be aware that you can’t use JSON.stringify to clone Functions and that Date objects will be stringified in the process.

  var clone = JSON.parse(JSON.stringify(obj));

• Lodash’s deep cloneDeep()Deep Clone

  var clone = _.cloneDeep(obj, true);

• Javascript ES6 Object.assign()Shallow CloneFASTEST

  const clone = Object.assign({}, obj);

• Javascript ES6 spread operatorShallow Clone

  const clone = {...obj};

• Lodash’s clone()Shallow Clone

  var clone = _.clone(obj, true);

For benchmarking I’ve used this JSPERF test setup.