Bootstrap/docs/utilities/position.md

layout	title	group
docs	Position	utilities

Position utilities are helpful for quickly placing a component outside the normal document flow. Choose from a handful of fixed or sticky position classes as needed.

Fixed top

Position an element at the top of the viewport, from edge to edge. Be sure you understand the ramifications of fixed position in your project; you may need to add aditional CSS.

{% highlight html %}

...

{% endhighlight %}

Fixed bottom

Position an element at the bottom of the viewport, from edge to edge. Be sure you understand the ramifications of fixed position in your project; you may need to add aditional CSS.

{% highlight html %}

...

{% endhighlight %}

Sticky top

Position an element at the top of the viewport, from edge to edge, but only after you scroll past it. The .sticky-top utility uses CSS's position: sticky, which isn't fully supported in all browsers.

{% highlight html %}

...

{% endhighlight %}