JSFiddle - React, Tailwind, and code Playground

HTML

<img src="https://img3.akspic.ru/image/124875-kartinka-supergerojskoe_kino-multfilm-vymyslennyj_personaz-supergeroj-1920x1200.jpg">

CSS

html,body{
  margin:0;
}
img{
  width:100vw;
  height:100vh;
  object-fit: cover;
}