Bootstrap includes a responsive, mobile first fluid grid system that appropriately scales up to 12 columns as the device or viewport size increases. It includes predefined classes for easy layout options, as well as powerful mixins for generating more semantic layouts.
-Grid systems are used for creating page layouts through a series of rows and columns that house your content. Here's how the Bootstrap grid system works:
.container (fixed-width) or .container-fluid (full-width) for proper alignment and padding.Look to the examples for applying these principles to your code.
-We use the following media queries in our Less files to create the key breakpoints in our grid system.
{% highlight scss %} /* Extra small devices (phones, less than 768px) */ @@ -41,7 +41,7 @@ @media (min-width: @screen-lg-min) { ... } {% endhighlight %} -See how aspects of the Bootstrap grid system work across multiple devices with a handy table.
Using a single set of .col-md-* grid classes, you can create a basic grid system that starts out stacked on mobile devices and tablet devices (the extra small to small range) before becoming horizontal on desktop (medium) devices. Place grid columns in any .row.
Turn any fixed-width grid layout into a full-width layout by changing your outermost .container to .container-fluid.
Don't want your columns to simply stack in smaller devices? Use the extra small and medium device grid classes by adding .col-xs-* .col-md-* to your columns. See the example below for a better idea of how it all works.
Build on the previous example by creating even more dynamic and powerful layouts with tablet .col-sm-* classes.
If more than 12 columns are placed within a single row, each group of extra columns will, as one unit, wrap onto a new line.
With the four tiers of grids available you're bound to run into issues where, at certain breakpoints, your columns don't clear quite right as one is taller than the other. To fix that, use a combination of a .clearfix and our responsive utility classes.
Move columns to the right using .col-md-offset-* classes. These classes increase the left margin of a column by * columns. For example, .col-md-offset-4 moves .col-md-4 over four columns.
To nest your content with the default grid, add a new .row and set of .col-sm-* columns within an existing .col-sm-* column. Nested rows should include a set of columns that add up to 12 or fewer (it is not required that you use all 12 available columns).
Easily change the order of our built-in grid columns with .col-md-push-* and .col-md-pull-* modifier classes.
In addition to prebuilt grid classes for fast layouts, Bootstrap includes Less variables and mixins for quickly generating your own simple, semantic layouts.
-Variables determine the number of columns, the gutter width, and the media query point at which to begin floating columns. We use these to generate the predefined grid classes documented above, as well as for the custom mixins listed below.
{% highlight scss %} @grid-columns: 12; @@ -402,7 +402,7 @@ @grid-float-breakpoint: 768px; {% endhighlight %} -Mixins are used in conjunction with the grid variables to generate semantic CSS for individual grid columns.
{% highlight scss %} // Creates a wrapper for a series of columns @@ -538,7 +538,7 @@ } {% endhighlight %} -You can modify the variables to your own custom values, or just use the mixins with their default values. Here's an example of using the default settings to create a two-column layout with a gap between.
{% highlight scss %} .wrapper { diff --git a/docs/_includes/css/overview.html b/docs/_includes/css/overview.html index 86a5b45b0e..bd0e538483 100644 --- a/docs/_includes/css/overview.html +++ b/docs/_includes/css/overview.html @@ -3,7 +3,7 @@Get the lowdown on the key pieces of Bootstrap's infrastructure, including our approach to better, faster, stronger web development.
-Bootstrap makes use of certain HTML elements and CSS properties that require the use of the HTML5 doctype. Include it at the beginning of all your projects.
{% highlight html %} @@ -12,7 +12,7 @@