JSFiddle - React, Tailwind, and code Playground

HTML

<img src="https://upload.wikimedia.org/wikipedia/commons/4/4d/Joseph_Wright_of_Derby_-_Dovedale_by_Moonlight_-_Google_Art_Project.jpg" />

<img src="https://upload.wikimedia.org/wikipedia/commons/d/df/Mr_Peanut_sketch_1917.jpg" />

CSS

img {
  max-width: 400px;
}

@media (max-width: 400px) {
  img {
    max-width: 100%;
  }
}