Bootstrap 4 is the newest version of Bootstrap; with new components, faster stylesheet and more responsiveness.

Bootstrap 4 supports the latest, stable releases of all major browsers and platforms. However, Internet Explorer 9 and down is not supported.

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If you require IE8-9 support, use Bootstrap 3. It is the most stable version of Bootstrap, and it is still supported by the team for critical bugfixes and documentation changes. However, no new features will be added to it.

Droppped icon support: Bootstrap 4 does not support BS3 Glyphicons. Use Font-Awesome or other icon libraries instead.

Why Use Bootstrap?

Advantages of Bootstrap:
  • Easy to use: Anybody with just basic knowledge of HTML and CSS can start using Bootstrap
  • Responsive features: Bootstrap's responsive CSS adjusts to phones, tablets, and desktops
  • Mobile-first approach: In Bootstrap, mobile-first styles are part of the core framework
  • Browser compatibility: Bootstrap 4 is compatible with all modern browsers (Chrome, Firefox, Internet Explorer 10+, Edge, Safari, and Opera)