JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://fortawesome.github.io/Font-Awesome/assets/font-awesome/css/font-awesome.css">
<a href="#">Click me! <i class="fa fa-plus-circle" />

JavaScript

$(function() {
    $('a').click(function() {
        $(this).find('i').toggleClass('fa-minus-circle fa-plus-circle');
    });
});