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This article is about whether bootstrap belongs to the js framework or not. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Bootstrap is not a js framework, but a CSS/HTML framework.

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.

In late January 2018, the Bootstrap team released the official version of Bootstrap 4, and the main changes in 4 include the following:

● migrated from Less to Sass

● improves Grid system

● default elastic frame support

● Dropped wells, thumbnails, and panels for cards

● merges all HTML resets into a new module: Reboot

New customization options for ●

● no longer supports IE8

● rewrites all JavaScript plug-ins

● improves automatic positioning of tooltips and popovers

● improvement documentation

● has a lot of other improvements

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