Bootstrap is a set of open front end for websites and web application development (so-called "front end" refers to the interface presented to the end user. Corresponding to the "back end" is the above code running in the server) framework, comprising HTML, CSS and JavaScript framework that provides typography, forms, buttons, navigation and various other components and Javascript extension designed to enable the development of dynamic Web pages and Web applications easier.
Bootstrap latest version of Google Chrome, Firefox, Internet Explorer, Opera and Safari browser compatible, although some browsers are not supported by all operating systems.
Beginning from version 2.0, Bootstrap support responsive web design (RWD). Page layout can be dynamically adjusted based on the web page display device (desktop, tablet, phone).
Version 3.0, Bootstrap mobile device priority as design guidelines, a greater emphasis on responsive design.
4.0 alpha version adds support for Sass and the Flexbox.
Bootstrap is open-source software, available from GitHub above. Developers are encouraged to participate in the project, and make their own contribution to the project.
Bootstrap modular design and with LESS stylesheet language to implement various components and tools. A file named bootstrap.less include these components and tools, developers can modify this file to decide which components project needs.
It may be limited customization through a basic configuration file, in addition, be more in-depth customization.
LESS support language variables, functions, operators, and combinations selector called Mixin (mixed) function.
Starting Bootstrap 2.0, Bootstrap documents including one called "custom" special options, developers can select the components and effects included according to their actual needs, and then generate and download precompiled packages.
And in response to the grid system design to 1170 pixels wide reference. In addition developers can also customize standard. In both cases, Bootstrap can provide four variants: the phone portrait, landscape mobile phones and tablet PCs, PC low-resolution, high-resolution, each variant will automatically adjust the grid width.