bootstrap in wev code example
Example 1: what is bootstrap
Bootstrap is a free and open-source CSS framework directed at responsive,
mobile-first front-end web development developed by TWITTER
It contains CSS- and JavaScript-based design templates for typography, forms,
buttons, navigation, and other interface components.
Example 2: bootsrsrap
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">