debug ? this.state.isVisible ? "partially visible" : "hidden" : null;
debug ? this.state.isVisible && somethingComplex ? "partially visible" : "hidden" : null;

a => a ? () => {a} : () => {a}
a => a ? a : a
a => a ? aasdasdasdasdasdasdaaasdasdasdasdasdasdasdasdasdasdasdasdasdaaaaaa : a