QueryLogic.set.union(setA, setB)

Performs a union of setA and setB and returns the result. Will throw an error if defineComparison has not been called with comparison operations necessary to perform the union. Use union to perform a union between two plain Query objects.

QueryLogic.set.union can be used to test custom comparison types:

import {QueryLogic} from "can";

const gt3 = new QueryLogic.GreaterThan(3);
const lt6 = new QueryLogic.LessThan(6);

const union = QueryLogic.union(gt3, lt6);
console.log( union ); //-> QueryLogic.UNIVERSAL