Responsive web design is the aproach that suggests that design and development shuld respond to the user's behaviour and environment based on screen size, platform and orientation. The practice consists of a mix of flexible grids and layouts, images and an intelligent use of CSS media queries. As the user switches from their laptop to iPad, the wbsie should automatically switch to accommodat for resolution, image size and scripting abilites.
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Bootstrap is an open source toolkit for developing with HTML, CSS and JS. Quickly prototype your ideas or build yur entire app with our Sass variables and mixins,responsive grid system,extensive prebuilt components, and powerful plugis built on jQuery.