Intersection and difference in Sets

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There are no build-in methods for intersection and difference in Sets, but you can still achieve that but converting them to arrays, filtering, and converting back to Sets:

var set1 = new Set([1, 2, 3, 4]),
    set2 = new Set([3, 4, 5, 6]);

const intersection = new Set(Array.from(set1).filter(x => set2.has(x)));//Set {3, 4}
const difference = new Set(Array.from(set1).filter(x => !set2.has(x))); //Set {1, 2}

Found a mistake? Have a question or improvement idea? Let me know.

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