https://css-tricks.com/reactive-uis-vanillajs-part-2-class-based-components/
origin - http://www.pipiscrew.com/2017/06/reactive-uis-with-vanillajs/ reactive-uis-with-vanillajs
https://css-tricks.com/reactive-uis-vanillajs-part-2-class-based-components/
origin - http://www.pipiscrew.com/2017/06/reactive-uis-with-vanillajs/ reactive-uis-with-vanillajs