JSFiddle - React, Tailwind, and code Playground

HTML

<img src="https://download.unsplash.com/photo-1433838552652-f9a46b332c40"/>

CSS

img {
    width: 300px;
    height: 300px;
}
img:hover {
	filter: grayscale(1);
	-webkit-filter: grayscale(1);
	-moz-filter: grayscale(1);
	-o-filter: grayscale(1);
	-ms-filter: grayscale(1);
}