Object.assign—override nested property

Question

I have an Object a like that:

const a = {
  user: {
   …
   groups: […]
   …
  }
}

whereby there are a lot more properties in

Answer 1

You can change it this way,

const b = Object.assign({}, a, {
  user: Object.assign({}, a.user, {
          groups: {}
        })
});