Bootstrap 4 Revolution

In 2018, Bootstrap 4 was released and marked a major upgrade in the framework’s history.

• It switched from Less to Sass, making customization easier.
• Flexbox was adopted for layouts, which improved responsiveness and alignment.
• New components like cards were introduced.
• Forms and utility classes became more flexible.
• Support for old browsers like Internet Explorer 8 and 9 was removed.

For many developers, Bootstrap 4 became a game-changer in creating powerful, modern web applications.