JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
<body>
    <div class="ekran1"></div>
    <div class="ekran2"></div>
</body>
</html>

CSS

html, body { width: 100%; height: 100%; }
.ekran1 { width: 100%; height: 100%; background: red; }
.ekran2 { width: 100%; height: 100%; background: blue; }