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Bootstrap ->(>>>>>>>>>>>>>>>>>>>>>>>>>>) is a free open source framework for front-end mobile website development. All code is executed in the user’s browser. In contrast, in back-end development, code matching the request is executed on a server and the result is sent to the user.

Bootstrap contains design templates in the languages CSS (Cascading Style Sheets) and optionally JavaScript for typography, forms, buttons, navigation and other interface components.

It was originally developed by the company Twitter and made available to the general public as an open source project in 2011.


Bootstrap simplifies the development of informative website (as opposed to web applications). Once added to a project, the framework provides basic style definitions for all HTML elements such as buttons, tables, and forms. As a result, Web pages display consistently in all Web browsers. Developers can also use the CSS classes from Bootstrap to further customize the display of content.


Bootstrap also contains several Javascript components in the form of jQuery plugins. They provide additional user interface elements, such as dialog boxes, tooltips, and photo slideshows. Each component of the framework consists of

  • of an HTML structure,
  • CSS declarations, and
  • as the case may be, Javascript code.

They also extend the functionality of some existing UI elements, including, for example, an auto-complete function for input fields.

The best-known components of the framework are the layout components, since they affect an entire Web page.

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