- Bootstrap is a free and open-source collection of tools for creating websites and web applications. It contains HTML- and CSS-based design templates for typography, forms, buttons, navigation and other interface components, as well as optional JavaScript extensions. It aims to ease the development of dynamic websites and web applications.
- Bootstrap is a front end framework, that is, an interface for the user, unlike the server-side code which resides on the "back end" or server.
/*================================================== = Bootstrap 3 Media Queries = ==================================================*/ /*========== Mobile First Method ==========*/ /* Custom, iPhone Retina */ @media only screen and (min-width : 320px) { } /* Extra Small Devices, Phones */ @media only screen and (min-width : 480px) { } /* Small Devices, Tablets */ @media only screen and (min-width : 768px) { } /* Medium Devices, Desktops */ @media only screen and (min-width : 992px) { } /* Large Devices, Wide Screens */ @media only screen and (min-width : 1200px) { } /*========== Non-Mobile First Method ==========*/ /* Large Devices, Wide Screens */ @media only screen and (max-width : 1200px) { } /* Medium Devices, Desktops */ @media only screen and (max-width : 992px) { } /* Small Devices, Tablets */ @media only screen and (max-width : 768px) { } /* Extra Small Devices, Phones */ @media only screen and (max-width : 480px) { } /* Custom, iPhone Retina */ @media only screen and (max-width : 320px) { }