queryLogic.isProperSubset(a, b)

Returns true if a is a strict subset of b. In set theory, this is represented by A ⊂ B.

import {QueryLogic} from "can";

const queryLogic = new QueryLogic();

const criticalSubset = queryLogic.isProperSubset({filter: {type: "critical"}}, {});
console.log( criticalSubset ); //-> true

const emptySet = queryLogic.isProperSubset({}, {});
console.log( emptySet ); //-> false