JSFiddle - React, Tailwind, and code Playground

HTML

<img src="http://img707.imageshack.us/img707/8589/aboves.jpg" width="100" height="67" alt="Тупо пример"/>

<img src="http://img707.imageshack.us/img707/8589/aboves.jpg" alt="Тупо пример"/>

CSS

img:not([width]):not([height]) {
    width: 500px;
    height: 333px;
}