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53 lines
1.9 KiB
Markdown
53 lines
1.9 KiB
Markdown
---
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layout: docs
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title: Sizing and positioning
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group: utilities
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---
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## Fixed positioning
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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:
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{% highlight scss %}
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.pos-f-t {
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position: fixed;
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top: 0;
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right: 0;
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left: 0;
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z-index: $zindex-navbar-fixed;
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}
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{% endhighlight %}
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## Width and height
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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%`.
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{% example html %}
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<div class="w-25 p-3" style="background-color: #eee;">Width 25%</div>
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<div class="w-50 p-3" style="background-color: #eee;">Width 50%</div>
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<div class="w-75 p-3" style="background-color: #eee;">Width 75%</div>
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<div class="w-100 p-3" style="background-color: #eee;">Width 100%</div>
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{% endexample %}
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{% example html %}
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<div style="height: 100px; background-color: rgba(255,0,0,0.1);">
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<div class="h-25 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height 25%</div>
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<div class="h-50 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height 50%</div>
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<div class="h-75 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height 75%</div>
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<div class="h-100 d-inline-block" style="width: 120px; background-color: rgba(0,0,255,.1)">Height 100%</div>
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</div>
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{% endexample %}
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You can also use `max-width: 100%;` and `max-height: 100%;` utilities as needed.
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{% example html %}
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<img class="mw-100" data-src="holder.js/1000px100?text=Max-width%20%3D%20100%25" alt="Max-width 100%">
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{% endexample %}
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{% example html %}
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<div style="height: 100px; background-color: rgba(255,0,0,0.1);">
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<div class="mh-100" style="width: 100px; height: 200px; background-color: rgba(0,0,255,0.1);">Max-height 100%</div>
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</div>
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{% endexample %}
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