Question

How do you copy properties from one object to other in Javascript?

Answer 1

You can use the Object.assign() method which is used to copy the values and properties from one or more source objects to a target object. It returns the target object which has properties and values copied from the source objects. The syntax would be as below,

Object.assign(target, ...sources);

Let's take example with one source and one target object,

const target = { a: 1, b: 2 };
const source = { b: 3, c: 4 };

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

console.log(target); // { a: 1, b: 3, c: 4 }

console.log(returnedTarget); // { a: 1, b: 3, c: 4 }

As observed in the above code, there is a common property(b) from source to target so it's value has been overwritten.