Reflect.construct()

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

let obj = new Foo(...args)
let obj = Reflect.construct(Foo, args)

function OneClass() {
    this.name = 'one'
}

function OtherClass() {
    this.name = 'other'
}

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

// ...has the same result as this:
let 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


//Another example to demonstrate below:

function func1(a, b, c, d) {
  console.log(arguments[3]);
}

function func2(d, e, f, g) {
  console.log(arguments[3]);
}

let obj1 = Reflect.construct(func1, ['I', 'Love', 'my', 'India'])
obj1

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

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

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

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

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