what is the meaning of deepClone(state)) in javascript code example

Example 1: clone javascript object

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

Example 2: javascript deep clone

var cloned = JSON.parse(JSON.stringify(objectToClone));

Example 3: how to make a deep copy in javascript

JSON.parse(JSON.stringify(o))

Example 4: object clone javascript

const target = { a: 1, b: 2 };
const source = { b: 4, c: 5 };

const returnedTarget = Object.assign(target, source);

console.log(target);
// expected output: Object { a: 1, b: 4, c: 5 }

console.log(returnedTarget);
// expected output: Object { a: 1, b: 4, c: 5 }