Shulou(Shulou.com)06/03 Report--

This article mainly introduces whether bootstrap is charged or not, which has a certain reference value. Interested friends can refer to it. I hope you will gain a lot after reading this article. Let's take a look at it.

No, bootstrap is free and open source. Bootstrap is a concise, intuitive and powerful front-end development framework developed by Mark Otto and Jacob Thornton of American Twitter company based on HTML, CSS and JavaScript, which makes Web development faster. Bootstrap provides elegant HTML and CSS specifications, which are written by the dynamic CSS language Less.

Bootstrap has been popular since its launch and has been a hot open source project on GitHub, including NASA's MSNBC (Microsoft National Broadcasting Corporation) Breaking News. Some frameworks that domestic mobile developers are familiar with, such as the WeX5 front-end open source framework, are also based on Bootstrap source code for performance optimization.

At present, versions 2, 3 and 4 are widely used, and the latest version of 2 is 2.3.2. The latest version of 3 is 3.3.7, and the latest version of 4 is 4.3.0.

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