Reflect.construct()

function func1(a, b, c) {
  this.sum = a + b + c;
}

const args = [1, 2, 3];
const object1 = new func1(...args);
const object2 = Reflect.construct(func1, args);

console.log(object2.sum);
// Expected output: 6

console.log(object1.sum);
// Expected output: 6

Reflect.construct(target, argumentsList[, newTarget])

var obj = new Foo(...args);
var obj = Reflect.construct(Foo, args);

function OneClass() {
  this.name = "one";
}

function OtherClass() {
  this.name = "other";
}

// Calling this:
var obj1 = Reflect.construct(OneClass, args, OtherClass);

// ...has the same result as this:
var obj2 = Object.create(OtherClass.prototype);
OneClass.apply(obj2, args);

console.log(obj1.name); // 'one'
console.log(obj2.name); // 'one'

console.log(obj1 instanceof OneClass); // false
console.log(obj2 instanceof OneClass); // false

console.log(obj1 instanceof OtherClass); // true
console.log(obj2 instanceof OtherClass); // true

function OneClass() {
  console.log("OneClass");
  console.log(new.target);
}
function OtherClass() {
  console.log("OtherClass");
  console.log(new.target);
}

var obj1 = Reflect.construct(OneClass, args);
// Output:
//     OneClass
//     function OneClass { ... }

var obj2 = Reflect.construct(OneClass, args, OtherClass);
// Output:
//     OneClass
//     function OtherClass { ... }

var obj3 = Object.create(OtherClass.prototype);
OneClass.apply(obj3, args);
// Output:
//     OneClass
//     undefined

var d = Reflect.construct(Date, [1776, 6, 4]);
d instanceof Date; // true
d.getFullYear(); // 1776