instanceof Operator

When you defined your mixins using the Mixin() decorator function, then it will support instanceof checks. Consider the following example:

// A regular mixin without "Mixin" decorator 
const MixinA = (superclass) => class extends superclas {
    // ...not shown...
};

// Mixin with "Mixin" decorator
const MixinB = Mixin((superclass) => class extends superclass {
    // ...not shown...
});

// -------------------------------------------------------------------- //

class A {}

class B extends mix(A).with(
    MixinA,
    MixinB
) {}

// -------------------------------------------------------------------- //

const instance = new B();

console.log(instance instanceof A); // true
console.log(instance instanceof B); // true
console.log(instance instanceof MixinA); // false
console.log(instance instanceof MixinB); // true