JS: Set.prototype.clear

New in ES2015.

set_obj.clear()

Delete all values of the set set_obj.

Return undefined.

const s = new Set([3,4,5]);

// clear set

console.log( s.clear() ); // Returns undefined

console.log(s); // Set {}

Reference

ECMAScript 2015 §Keyed Collection#sec-set.prototype.clear