Reflect.get

Reflect.get(target, propertyKey[, receiver])

// Object
var obj = { x: 1, y: 2 };
Reflect.get(obj, 'x' // 1

// Array
Reflect.get(['zero', 'one'], 1 // "one"

// Proxy with a get handler
var x = {p: 1};
var obj = new Proxy(x, {
  get(t, k, r) { return k + 'bar'; }
}
Reflect.get(obj, 'foo' // "foobar"