29 lines
749 B
Markdown
29 lines
749 B
Markdown
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---
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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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## Full width
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Easily make an element as wide as its parent using the `.w-100` utility class, which sets `width: 100%`.
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{% example html %}
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<img class="w-100" data-src="holder.js/200px100?outline=yes&text=Width%20%3D%20100%25" alt="Width = 100%">
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{% endexample %}
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