how to deep copy an object in javascript

1JSON.parse(JSON.stringify(object))

1let clone = Object.assign({}, objToClone);

1JSON.parse(JSON.stringify(o))

1const obj1 = { a: 1, b: 2, c: 3 };
2// this converts the object to string so there will be no reference from 
3// this first object
4const s = JSON.stringify(obj1);
5
6const obj2 = JSON.parse(s);

1const deepCopyFunction = (inObject) => {
2  let outObject, value, key
3
4  if (typeof inObject !== "object" || inObject === null) {
5    return inObject // Return the value if inObject is not an object
6  }
7
8  // Create an array or object to hold the values
9  outObject = Array.isArray(inObject) ? [] : {}
10
11  for (key in inObject) {
12    value = inObject[key]
13
14    // Recursively (deep) copy for nested objects, including arrays
15    outObject[key] = deepCopyFunction(value)
16  }
17
18  return outObject
19}