JSFiddle - React, Tailwind, and code Playground

HTML

<link href='http://fonts.googleapis.com/css?family=Open+Sans' rel='stylesheet' type='text/css'>

<div>Block Element: Font size and line height is 15 px</div>

<br>

<span>Inline Element: Font size and line height is 15 px</span>

CSS

div, span{
    font-family: "Open Sans";
    font-size: 15px;
    line-height: 15px;

    background: blue;
    color: white;
}