JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" />

CSS

input {
    box-shadow:inset 0 0 10px #000000;
    -moz-box-shadow:inset 0 0 10px #000000;
    -webkit-box-shadow:inset 0 0 10px #000000;
    
    background: transparent;
}