Demystifying the JavaScript instanceof Operator: Internal Mechanics and Prototype Chains
Unlike the typeof operator, which collapses all reference types into a uniform "object" return value, JavaScript provides the instanceof operator to verify exact type matches against constructor functions. This operator answers a precise structural question: does this object's prototype chain trace back to a specific constructor's exp ...
Posted on Wed, 21 Oct 2026 16:43:15 +0000 by tphgangster