compare-sets

Given two sets, compare-sets will return sets of the added, retained, and removed items

Installation

npm install [--save] compare-sets

Usage

var oldSet = new Set([1, 2, 3, 4])
var newSet = new Set([2, 4, 5, 6])
 
compareSets(oldSet, newSet)
// {
//   added: Set { 5, 6 },
//   retained: Set { 2, 4 },
//   remvoed: Set { 1, 3 }
// }

Caveats

This library assumes an environment with Set available