JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" class="search" />

CSS

.search {
    border: 0px solid blue;
    border-bottom-width: 1px;
    -webkit-box-shadow: -5px 4px 0px -4px blue;
       -moz-box-shadow: -5px 4px 0px -4px blue;
            box-shadow: -5px 4px 0px -4px blue;
}