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New position utils, split docs

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- Renames .pos-f-t to .fixed-top, adds .fixed-bottom and .sticky-top
- Updates utilities Sass to be split across more files (one for position, sizing, and spacing)
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Mark Otto
2017-01-02 11:45:30 -08:00
parent fa1ef15212
commit 21b28903a4
5 changed files with 35 additions and 21 deletions
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docs/utilities/sizing.md
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---
layout: docs
title: Sizing and positioning
group: utilities
---
## Fixed positioning
The `.pos-f-t` class can be used to easily position elements at the top of the viewport and make them as wide as the viewport. **Be sure you understand the ramifications of fixed-position elements within your project.** Here's how the class is defined:
{% highlight scss %}
.pos-f-t {
position: fixed;
top: 0;
right: 0;
left: 0;
z-index: $zindex-navbar-fixed;
}
{% endhighlight %}
## Width and height
Easily make an element as wide or as tall (relative to its parent) with our width and height utilities. Includes support for `25%`, `50%`, `75%`, and `100%`.
{% example html %}
<div class="w-25 p-3" style="background-color: #eee;">Width 25%</div>
<div class="w-50 p-3" style="background-color: #eee;">Width 50%</div>
<div class="w-75 p-3" style="background-color: #eee;">Width 75%</div>
<div class="w-100 p-3" style="background-color: #eee;">Width 100%</div>
{% endexample %}
{% example html %}
<div style="height: 100px; background-color: rgba(255,0,0,0.1);">
<div class="h-25 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height 25%</div>
<div class="h-50 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height 50%</div>
<div class="h-75 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height 75%</div>
<div class="h-100 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height 100%</div>
</div>
{% endexample %}
You can also use `max-width: 100%;` and `max-height: 100%;` utilities as needed.
{% example html %}
<img class="mw-100" data-src="holder.js/1000px100?text=Max-width%20%3D%20100%25" alt="Max-width 100%">
{% endexample %}
{% example html %}
<div style="height: 100px; background-color: rgba(255,0,0,0.1);">
<div class="mh-100" style="width: 100px; height: 200px; background-color: rgba(0,0,255,0.1);">Max-height 100%</div>
</div>
{% endexample %}