Prepare v5.1.0. (#34674)v5.1.0

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+---
+layout: docs
+title: Position
+description: Use these helpers for quickly configuring the position of an element.
+group: helpers
+toc: true
+---
+
+## 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 additional CSS.
+
+```html
+<div class="fixed-top">...</div>
+```
+
+## 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 additional CSS.
+
+```html
+<div class="fixed-bottom">...</div>
+```
+
+## 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.
+
+```html
+<div class="sticky-top">...</div>
+```
+
+## Responsive sticky top
+
+Responsive variations also exist for `.sticky-top` utility.
+
+```html
+<div class="sticky-sm-top">Stick to the top on viewports sized SM (small) or wider</div>
+<div class="sticky-md-top">Stick to the top on viewports sized MD (medium) or wider</div>
+<div class="sticky-lg-top">Stick to the top on viewports sized LG (large) or wider</div>
+<div class="sticky-xl-top">Stick to the top on viewports sized XL (extra-large) or wider</div>
+```