JSFiddle - React, Tailwind, and code Playground

HTML

<input type="button" class="bottone-icona" value="clicca" />

CSS

.bottone-icona {
    padding:5px;
    padding-right:15px;
    background-image: url('http://det.wa.edu.au/ccm-ldn-theme-assets/__ccm__/themes-prod/careers/images/bullet_arrow_right.png');
    background-position:right;
    background-repeat:no-repeat;
    border:1px solid #ccc;
}