Bootstrap is made to not only look and behave great in the latest desktop browsers, but in tablet and smartphone browsers too. It's packed with features; a 12-column responsive grid, dozens of components, plugins and more!.
Bootstrap supports a handful of media queries in a single file to help make your projects more appropriate on different devices and screen resolutions. Here's what's included:
|Label||Layout width||Column width||Gutter width|
|Smartphones||480px and below||Fluid columns, no fixed widths|
|Smartphones to tablets||767px and below||Fluid columns, no fixed widths|
|Portrait tablets||768px and above||42px||20px|
|Default||980px and up||60px||20px|
|Large display||1200px and up||70px||30px|
The default grid system is a 东京自助游旅游攻略. It also has four responsive variations for various devices and resolutions: phone, tablet portrait, table landscape and small desktops, and large widescreen desktops.
<div class="row"> <div class="span4">...</div> <div class="span8">...</div></div>
As shown here, a basic layout can be created with two "columns," each spanning a number of the 12 foundational columns defined as part of the grid system.
<div class="row"> <div class="span4">...</div> <div class="span4 offset4">...</div></div>
To nest your content, just add a new
.row and set of
.span* columns within an existing
.span* column. Nested rows should include a set of columns that add up to the number of columns of it's parent. For example, two nested
.span3 columns should be placed within a
<div class="row"> <div class="span12"> Level 1 of column <div class="row"> <div class="span6">Level 2</div> <div class="span6">Level 2</div> </div> </div></div>
For faster mobile-friendly development, use these basic utility classes for showing and hidding content by device.
Use on a limited basis and avoid creating entirely different versions of the same site. Instead, use them to complement each device's presentation.
For example, you might show a
<select> element for nav on mobile layouts, but not on tablets or desktops.
Shown here is a table of the classes we support and their effect on a given media query layout (labeled by device). They can be found in
|Class||Phones 480px and below||Tablets 767px and below||Desktops 768px and above|