Is it possible to destructure onto an existing object? (Javascript ES6)

Question

For example if I have two objects:

var foo = {
  x: \"bar\",
  y: \"baz\"
}

and

var oof = {}

and I want

Answer 1

You can just use restructuring for that like this:

const foo = {x:"a", y:"b"};
const {...oof} = foo; // {x:"a", y:"b"} 

Or merge both objects if oof has values:

const foo = {x:"a", y:"b"};
let oof = {z:"c"}
oof = Object.assign({}, oof, foo)