Bootstrap is a framework that allows developers to create websites for all kinds of devices. To this end, the open-source project offers design templates based on HTML and CSS, as well as additional extensions for JavaScript.
Initially, Twitter had planned Bootstrap as an internal company tool for design homogenization. However, in 2011, the framework was published on the collaborative software development platform GitHub, wherein in a very short period of time and with dozens of further developments, it became one of its most popular projects.
