Tooltips Inspired by the excellent Tipsy jQuery plugin written by Jason Frame. Tooltips are an updated version, which don’t rely on images, use CSS3 for animations, and data-attributes for local title storage. Contents Overview Example: Enable tooltips everywhere Examples Static demo Interactive demo Usage Markup Options Methods $().tooltip(options) .tooltip('show') .tooltip('hide') .tooltip('toggle') .tooltip('dispose') Events Overview Things to know when using the tooltip plugin: Tool

Grid system Bootstrap includes a powerful mobile-first flexbox grid system for building layouts of all shapes and sizes. It’s based on a 12 column layout and has multiple tiers, one for each media query range. You can use it with Sass mixins or our predefined classes. Contents How it works Grid options Auto-layout columns Equal-width Setting one column width Variable width content Equal-width multi-row Responsive classes All breakpoints Stacked to horizontal Mix and match Alignment Vertica

Download Bootstrap v4.0.0-alpha.6 is available for download in several ways, including some of your favorite package managers. Choose from the options below to snag just what you need. Contents Bootstrap CSS and JS Source files Bootstrap CDN Package managers npm RubyGems Composer Bower NuGet Bootstrap CSS and JS Download Bootstrap’s ready-to-use code to easily drop into your project. Includes compiled and minified versions of all our CSS bundles (default, grid only, or Reboot only) and Java

Customization options Customize Bootstrap 4 with our built-in custom variables file and easily toggle global CSS preferences with new $enable-* Sass variables. Override a variable’s value and recompile with the included Gruntfile as needed. Customizing variables Bootstrap 4 ships with a _custom.scss file for easy overriding of default variables in /scss/_variables.scss. Copy and paste relevant lines from there into the _custom.scss file, modify the values, and recompile your Sass to change our

Spacing Assign responsive-friendly margin or padding values to an element or a subset of its sides with shorthand classes. Includes support for individual properties, all properties, and vertical and horizontal properties. Classes are built from a default Sass map ranging from .25rem to 3rem. Contents Notation Examples Horizontal centering Notation Spacing utilities that apply to all breakpoints, from xs to xl, have no breakpoint abbreviation in them. This is because those classes are appli

Vertical alignment Change the alignment of elements with the vertical-alignment utilities. Please note that vertical-align only affects inline, inline-block, inline-table, and table cell elements. Choose from .align-baseline, .align-top, .align-middle, .align-bottom, .align-text-bottom, and .align-text-top as needed. With inline elements: Open example on getbootstrap.com <span class="align-baseline">baseline</span> <span class="align-top">top</span> <span class="align

Alerts Provide contextual feedback messages for typical user actions with the handful of available and flexible alert messages. Contents Examples Link color Additional content Dismissing JavaScript behavior Triggers Methods Events Examples Alerts are available for any length of text, as well as an optional dismiss button. For proper styling, use one of the four required contextual classes (e.g., .alert-success). For inline dismissal, use the alerts jQuery plugin. Open example on getbootst

Best practices We’ve designed and developed Bootstrap to work in a number of environments. Here are some of the best practices we’ve gathered from years of working on and using it ourselves. Heads up! This copy is a work in progress. General outline Working with CSS Working with Sass files Building new CSS components Working with flexbox Ask in Slack

Dropdowns Dropdowns are toggleable, contextual overlays for displaying lists of links and more. They’re made interactive with the included Bootstrap dropdown JavaScript plugin. They’re toggled by clicking, not by hovering; this is an intentional design decision. Contents Examples Single button dropdowns Split button dropdowns Sizing Dropup variation Menu items Menu alignment Menu headers Menu dividers Disabled menu items Usage Via data attributes Via JavaScript Options Methods Events Exam

Forms Bootstrap provides several form control styles, layout options, and custom components for creating a wide variety of forms. Contents Form controls Textual inputs Form layouts Form groups Inline forms Using the Grid Checkboxes and radios Default (stacked) Inline Without labels Static controls Disabled states Readonly inputs Control sizing Column sizing Help text Block level Inline Validation How it works Defining states Examples Custom forms Checkboxes and radios Checkboxes Rad