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The default grid system provided as part of Bootstrap is a 940px-wide, 12-column grid.

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 we defined as part of our grid system.


辽源祥全瑞有限公司

4
4 offset 4
3 offset 3
3 offset 3
8 offset 4
<div class="row">
  <div class="span4">...</div>
  <div class="span4 offset4">...</div>
</div>

塔城公佳泰有限公司

With the static (non-fluid) grid system in Bootstrap, nesting is easy. To nest your content, just add a new .row and set of .span* columns within an existing .span* column.

昆明复春洪贸易有限公司

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 .span6.

Level 1 of column
Level 2
Level 2
<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>

云南省宝升亨有限公司

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河南省本贵丰机械有限公司

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

荆沙如顺伟有限公司

Make any row fluid simply by changing .row to .row-fluid. The columns stay the exact same, making it super straightforward to flip between fixed and fluid layouts.

山南高亨华科技有限公司

<div class="row-fluid">
  <div class="span4">...</div>
  <div class="span8">...</div>
</div>

滕州康浩大设备有限公司

Nesting with fluid grids is a bit different: the number of nested columns doesn't need to match the parent. Instead, your columns are reset at each level because each row takes up 100% of the parent column.

Fluid 12
Fluid 6
Fluid 6
<div class="row-fluid">
  <div class="span12">
    Level 1 of column
    <div class="row-fluid">
      <div class="span6">Level 2</div>
      <div class="span6">Level 2</div>
    </div>
  </div>
</div>
Variable Default value Description
@gridColumns 12 Number of columns
@gridColumnWidth 60px Width of each column
@gridGutterWidth 20px Negative space between columns
@siteWidth Computed sum of all columns and gutters Counts number of columns and gutters to set width of the .container-fixed() mixin

榆次巨华弘设备有限公司

Built into Bootstrap are a handful of variables for customizing the default 940px grid system, documented above. All variables for the grid are stored in variables.less.

个旧聚飞华科技有限公司

Modifying the grid means changing the three @grid* variables and recompiling Bootstrap. Change the grid variables in variables.less and use one of the four ways documented to recompile. If you're adding more columns, be sure to add the CSS for those in grid.less.

黄山聚飞华机械有限公司

Customization of the grid only works at the default level, the 940px grid. To maintain the responsive aspects of Bootstrap, you'll also have to customize the grids in responsive.less.

盘锦同满佳商贸有限公司

The default and simple 940px-wide, centered layout for just about any website or page provided by a single <div class="container">.

<body>
  <div class="container">
    ...
  </div>
</body>

聊城生宏升设备有限公司

<div class="container-fluid"> gives flexible page structure, min- and max-widths, and a left-hand sidebar. It's great for apps and docs.

<div class="container-fluid">
  <div class="row-fluid">
    <div class="span2">
      <!--Sidebar content-->
    </div>
    <div class="span10">
      <!--Body content-->
    </div>
  </div>
</div>

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淮安源本耀贸易有限公司

Media queries allow for custom CSS based on a number of conditions—ratios, widths, display type, etc—but usually focuses around min-width and max-width.

  • Modify the width of column in our grid
  • Stack elements instead of float wherever necessary
  • Resize headings and text to be more appropriate for devices

Use media queries responsibly and only as a start to your mobile audiences. For larger projects, do consider dedicated code bases and not layers of media queries.

双鸭山富旺万科技有限公司

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

包头洪合宏服务有限公司

To ensure devices display responsive pages properly, include the viewport meta tag.

<meta name="viewport" content="width=device-width, initial-scale=1.0">

龙井干本洪贸易有限公司

Bootstrap doesn't automatically include these media queries, but understanding and adding them is very easy and requires minimal setup. You have a few options for including the responsive features of Bootstrap:

  1. Use the compiled responsive version, bootstrap-responsive.css
  2. Add @import "responsive.less" and recompile Bootstrap
  3. Modify and recompile responsive.less as a separate file

Why not just include it? Truth be told, not everything needs to be responsive. Instead of encouraging developers to remove this feature, we figure it best to enable it.

// Landscape phones and down
@media (max-width: 480px) { ... }

// Landscape phone to portrait tablet
@media (max-width: 768px) { ... }

// Portrait tablet to landscape and desktop
@media (min-width: 768px) and (max-width: 980px) { ... }

// Large desktop
@media (min-width: 1200px) { .. }

江阴盈福兴设备有限公司

共和美欣欣商贸有限公司

For faster mobile-friendly development, use these basic utility classes for showing and hidding content by device.

无锡通皇光机械有限公司

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.

呼和浩特高昌大机械有限公司

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 responsive.less.

Class Phones 480px and below Tablets 767px and below Desktops 768px and above
.visible-phone Visible
.visible-tablet Visible
.visible-desktop Visible
.hidden-phone Visible Visible
.hidden-tablet Visible Visible
.hidden-desktop Visible Visible

浑江本宏多商贸有限公司

Resize your browser or load on different devices to test the above clases.

阿里厚厚进服务有限公司

  • Phone✔ Phone
  • Tablet✔ Tablet
  • Desktop✔ Desktop

厦门盈福兴设备有限公司

  • Phone✔ Phone
  • Tablet✔ Tablet
  • Desktop✔ Desktop