JSFiddle - React, Tailwind, and code Playground

HTML

<p id="one">Testing</p>
<p id="two">Testing</p>
<p id="three">Testing</p>

CSS

p { font-family: Arial, sans-serif; font-size: 40px; margin: 0; }

#one { font-weight: normal; }
#two { font-weight: 700; }
#three { font-weight: 900; }