From the previous blog Bootstrap 3 vs 4 vs 5: Which to Choose? comparisons are made between each version and what major changes are for them. When it comes to designing and ease of use for developing CSS, HTML, and Javascript, Bootstrap is one of the most popular front-end frameworks.  According to the BuiltWith report, Bootstrap is the most popular design framework and powers over 20 million websites.  And some of the most popular and beautiful websites that are using Bootstrap (to name a few) are Lee Clothing, Reuters News, Etsy, and many others.