What's up Bootstrap

Open Source and Mobile First

mobilefirst

Bootstrap is a free and open source framework that uses the mobile-first technology for front-end development Bootstrap contains CSS and Javascript based on design templates for different types of content like:

Some of Bootstrap Components

accordion
Accordion

Build vertically collapsing accordions in combination with the Collapse JavaScript plugin.

This is the first item's accordion body. It is shown by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the .accordion-body, though the transition does limit overflow.
buttons
Buttons

Use Bootstrap’s custom button styles for actions in forms, dialogs, and more with support for multiple sizes, states, and more.

progressbar
Progress Bar

Bootstrap custom progress bars featuring support for stacked bars, animated backgrounds, and text labels.

loading
Spiner

Indicate the loading state of a component or page with Bootstrap spinners, built entirely with HTML, CSS, and no JavaScript.