JS: Array.of

New in ES2015.

Array.of ( v1, v2 … )

Return a new array with elements of v1, v2, etc.

Purpose of Array.of is to provide a functional form of the array literal expression e.g. [3,4,5].

console.log( Array.of(3)); // [3]
console.log( Array.of(3,4)); // [3, 4]
console.log( Array.of(3,4, 'x')); // [3, 4, 'x']

[see JS: Array Constructor]

Reference

ECMAScript® 2016 Language Specification#sec-array.of