queryLogic.isSpecial(query)

Returns true if query is UNIVERSAL, EMPTY, UNDEFINABLE, or UNKNOWABLE.

import {QueryLogic} from "can";

const queryLogic = new QueryLogic();

const emptyObject = queryLogic.isSpecial({});
console.log( emptyObject ); //-> false

const testQuery = queryLogic.isSpecial({filter: {type: "Test"}});
console.log( testQuery ); //-> false

const universal = queryLogic.isSpecial(QueryLogic.UNIVERSAL);
console.log( universal ); //-> true

const undefinable = queryLogic.isSpecial(QueryLogic.UNDEFINABLE);
console.log( undefinable ); //-> true