Bootstrap 4 is the fourth major version of the popular front-end component library. The Bootstrap framework aids in the creation of responsive, mobile-first websites and web apps.
Bootstrap 4 is the fourth major version of the popular front-end component library and open-source toolkit for developing with HTML, CSS, and JS. The Bootstrap framework aids in the creation of responsive, mobile-first websites and web apps. Bootstrap 4 embraces flexbox and Sass technologies. Bootstrap is open-sourced on GitHub.
The latest release of bootstrap-4 is 4.6.1.
There are newer versions at getbootstrap.com
Stack Snippet Starter Pack
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.1/dist/css/bootstrap.min.css" integrity="sha384-zCbKRCUGaJDkqS1kPbPd7TveP5iyJE0EjAuZQTgFLD2ylzuqKfdKlfG/eSrtxUkn" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/jquery@3.5.1/dist/jquery.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@4.6.1/dist/js/bootstrap.bundle.min.js" integrity="sha384-fQybjgWLrvvRgtW6bFlB7jaZrFsaBXjsOMm/tB9LTS58ONXgqbR9W8oWht/amnpF" crossorigin="anonymous"></script>