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After reading the new (unfinished) Bootstrap 3 docs I am wondering how to create semantic mobile grid.
In short. How to convert this:
<div class="row">
<div class="col col-lg-6 col-sm-6">6</div>
<div class="col col-lg-6 col-sm-6">6</div>
</div>
To this and preserve the small mobile grid:
<div class="wrapper">
<div class="left">6</div>
<div class="right">6</div>
</div>
Less
.wrapper { .make-row(); }
.left { .make-column(6); // this creates only large grid }
.right { .make-column(6); }
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PART 1: Rant
I hate bootstrappers using html div classes as a presentation layer to their HTML!!! I applaud you looking to program your site correctly.
It reminds me of the 90s and early 2000s when we were all building websites with tables... are we going backwards people?
<div class="col-6 col-lg-6 col-sm-6">6</div>
<div class="col-6 col-lg-6 col-sm-6">6</div>
vs
<table><tr><td>6</td><td>6</td></tr></table>
I'm waiting for the day that Google imposes penalties on non-semantic markup.
PART 2: Solution
Anyhow, pulling this back to the question...
For bootstrap 3, as far as I am aware, you cannot use .make-column(6) etc... as per Bass Jobsen's answer because you need to specify the size of the window / screen. lg / md / sm / xs
Here is how I would do it...
main.less
@import 'bootstrap.less';
.wrapper {
.container;
.make-row();
.clearfix();
}
.content-main { // Change these for each window size
.make-lg-column(6);
.make-md-column(6);
.make-sm-column(6);
.make-xs-column(6);
}
.content-sidebar { // change these for each window size
.make-lg-column(6);
.make-md-column(6);
.make-sm-column(6);
.make-xs-column(6);
}
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<title>Page Title</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta charset="UTF-8">
<style rel="stylesheet/less" src="less/main.less" />
<script src="js/less-1.4.1.min.js" type="text/javascript"></script>
<!-- HTML5 shim and Respond.js IE8 support of HTML5 elements and media queries -->
<!--[if lt IE 9]>
<script src="assets/js/html5shiv.js"></script>
<script src="assets/js/respond.min.js"></script>
<![endif]-->
</head>
<body>
<div class="wrapper">
<div class="content-main">
<div class="page-title">
<!-- Page Title Stuff -->
</div>
<div class="page-content">
<!-- Page Content Stuff -->
</div>
</div>
<div class="content-sidebar"><!-- Page Footer Stuff --></div>
</div>
</body>
63
If i understand your question well i think you should use:
<div class="row">
<div class="col-span-6 col-small-span-6″>6</div>
<div class="col-span-6 col-small-span-6″>6</div>
</div>
Where col-span-6 is your class for the large grid and col-small-span-6 for the small grid. If you leave col-small-span-6 your div will stack. The small grid don't use the col-span-* classes.
See also: http://bassjobsen.weblogs.fm/migrate-your-templates-from-twitter-bootstrap-2-x-to-twitter-bootstrap-3/
From now Twitter’s Bootstrap defines three grids: Tiny grid for Phones (<480px), Small grid for Tablets (<768px) and the Medium-large grid for Destkops (>768px). The row class prefixes for these grid are “.col-”, “.col-sm-” and “.col-lg-”. The Medium-large grid will stack below 768 pixels screen width. So does the Small grid below 480 pixels and the tiny grid never stacks.
So your html should be:
<div class="row">
<div class="col-6 col-lg-6 col-sm-6">6</div>
<div class="col-6 col-lg-6 col-sm-6">6</div>
</div>
LESS
The latest version: https://github.com/twitter/bootstrap/archive/3.0.0-wip.zip doesn't contain a .make-small-column function any more. See also: https://github.com/twbs/bootstrap/pull/8302 .make-column() will add a media query for min-width: @grid-float-breakpoint so on the small grid your columns will stack always using this function.
You could try:
// Generate the small columns
.make-small-column(@columns) {
position: relative;
float: left;
// Prevent columns from collapsing when empty
min-height: 1px;
// Inner gutter via padding
padding-left: (@grid-gutter-width / 2);
padding-right: (@grid-gutter-width / 2);
@max : (@grid-float-breakpoint - 1 );
// Calculate width based on number of columns available
@media (max-width: @max) {
width: percentage((@columns / @grid-columns));
}
}
.wrapper { .make-row(); }
.left { .make-column(6); .make-small-column(6);}
.right { .make-column(6); .make-small-column(6);}
UPDATE
The answer above will be based on the release candidates of Twitter's Bootstrap 3. The final version of Twitter's Bootstrap 3 has 4 grid extra small (xs), small (sm), medium (md) and large (lg). Also the Less code has been change according these grids. So use the .make-{x}-column mixins as described by @gravy in his answer: https://stackoverflow.com/a/18667955/1596547
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