Twitter Bootstrap is an open-source front-end framework that provides HTML, CSS, and JavaScript design templates for typography, forms, buttons, navigation, and other interface components as well as optional JavaScript extensions. It aims to aid web development and promote responsive design. Developed by developers at Twitter, Bootstrap is one of the most popular front-end frameworks, featuring a grid system, extensive pre-built components, and responsive design capabilities for a variety of screen sizes.

1. TWITTER BOOTSTRAP
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2. What is Twitter Bootstrap?
Twitter Bootstrap is a Sleek, intuitive, and powerful
front-end framework for faster and easier web
development. Twitter Bootstrap is a toolkit to
develop web apps and sites fast. It includes basic
CSS and HTML for creating Grids, Layouts,
Typography, Tables, Forms, Navigation, Alerts,
Popovers etc.

3. Features
• Bootstrap is open source and available on
GitHub
• Set of user interface elements, layouts, and
javascript tools
• Support HTML5 and CSS3
• Compatible with all major browsers
• Supports Responsive Design
• Provides well built set of jQuery plugins

4. Origin
• Developed by Mark Otto and Jacob Thornton at Twitter
• In August, 2011 Twitter released Bootstrap as open-
source
• In February 2012, it became the most popular GitHub
development project.

5. Structure
• Grid System
• Fluid Grid System
• Layouts
• Responsive Design

6. Grid System
The default Bootstrap grid system utilizes 12
columns, making for a 940px wide container without
responsive features enabled. With the responsive CSS
file added, the grid adapts to be 724px and 1170px
wide depending on your viewport. Below 767px
viewports, the columns become fluid and stack
vertically.

7. Fluid Grid System
The fluid grid system uses percents instead of pixels
for column widths. It has the same responsive
capabilities as our fixed grid system, ensuring proper
proportions for key screen resolutions and devices.

8. Layouts
• Fixed Layout
Provides a common fixed-width (and optionally responsive) layout
with only <div class="container">required.
• Fluid Layout
Create a fluid, two-column page with <div class="container-
fluid">—great for applications and docs.

9. Responsive Design
Responsive Web Design is an idea of providing the
user with best viewing experience of a website across
devices of various sizes. For responsive web deign to
work, you need to create a CSS which comprises of
styles suitable for various devices sizes, or better to say
for various device size ranges. Once the page is about
to load on a specific device, using various font end web
development techniques like Media Queries, the size
of the viewport of the device is detected, then the
styles specific to the device is loaded.

10. Supported Devices
Bootstrap supports a handful of media queries in a single file to
help make your projects more appropriate on different devices
and screen resolutions.
Label Layout width Column width Gutter width
Large display 1200px and up 70px 30px
Default 980px and up 60px 20px
Portrait tablets 768px and above 42px 20px
Phones to 767px and below Fluid columns, no fixed widths
tablets
Phones 480px and Fluid columns, no fixed widths
below

11. Components
Dozens of reusable components built to provide
navigation, alerts, popovers, and more.
• Dropdowns • Labels and Badges
• Button Groups • Typography
• Button dropdowns • Thumbnails
• Navs • Alerts
• Navbars • Progress Bars
• Breadcrumbs • Media Objects
• Pagination • Miscellaneous

12. Javascript
The JavaScript components of Bootstrap are based on the
jQuery JavaScript library. Plugins are accordingly found in the jQuery
toolkit plugins. They provide additional user-interface elements such as
dialog, tooltips and carousels. They also extend the functionality of some
existing interface elements, including for example an auto-complete
function for input fields. Supported JavaScript Plugins:
• Modal • Button
• Dropdown • Tooltip
• Scrollspy • Collapse
• Tab • Carousel
• Tooltip • Typeahead
• Popover • Affix
• Alert

13. Reasons to Use Bootstrap
• Save Time
The Bootstrap libraries offer readymade pieces of code that can pump life into a website.
• Customizable
It lets you factor in your own needs and tailor your development project accordingly.
• Factor in the Design
o Grid System
o CSS Components
o Javascript Plugins
• Consistency
Since it works with a central set of development code, Bootstrap’s results are uniform across
platforms.
• Updates
Bootstrap is ever-evolving with updates coming out on a much more regular
and constant basis.

14. Reasons to Use Bootstrap
• Integration
Integration is simple, fast and easy to accomplish and once done you can play with your design to
your heart’s content.
• Responsiveness
Bootstrap adapts to the change in platforms with super speed and efficiency.
• Future Compatibility
Bootstrap Comes equipped with many elements that are being considered the future of design
itself. For example HTML5 and CSS3.
• The docs Talk
Bootstrap gives you a head start because you don’t have to play with everything to learn and
instead can find information on just about anything through the documentation.

15. Sites Built With Twitter Bootstrap

18. NETGAINS AMERICA LLC
87 Wolfs Lane, 2nd Floor,
Pelham, New York – 10803
Office: +1 (917) 779-0480
Toll Free: +1 (866) 693-5132
W: www.netgainsamerica.com
E: biz@netgains.org