JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://fonts.googleapis.com/css?family=Petit+Formal+Script"></script>
<p>Yellow dog hello</p>

<h3>Hello world</h3>

CSS

P{
    font-family: 'Petit Formal Script', cursive !important;
    size:18px;
}

h3{
    font-family: 'Petit Formal Script', cursive;
    size:18px;
}