https://www.timmykokke.com/2017/09/why-does-javascript-even-have-null/
JavaScript Booleans
https://www.w3schools.com/js/js_booleans.asp
origin - http://www.pipiscrew.com/?p=10094 why-does-javascript-even-have-null
https://www.timmykokke.com/2017/09/why-does-javascript-even-have-null/
https://www.w3schools.com/js/js_booleans.asp
origin - http://www.pipiscrew.com/?p=10094 why-does-javascript-even-have-null