Add sticky bottom utility (#35518)
Co-authored-by: XhmikosR <xhmikosr@gmail.com>
This commit is contained in:
Florian Lacreuse
GitHub
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@ -22,7 +22,7 @@
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},
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{
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"path": "./dist/css/bootstrap-utilities.min.css",
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"maxSize": "6.85 kB"
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"maxSize": "7 kB"
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},
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{
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"path": "./dist/css/bootstrap.css",
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@ -16,7 +16,7 @@
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z-index: $zindex-fixed;
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}
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// Responsive sticky top
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// Responsive sticky top and bottom
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@each $breakpoint in map-keys($grid-breakpoints) {
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@include media-breakpoint-up($breakpoint) {
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$infix: breakpoint-infix($breakpoint, $grid-breakpoints);
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@ -26,5 +26,11 @@
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top: 0;
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z-index: $zindex-sticky;
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}
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.sticky#{$infix}-bottom {
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position: sticky;
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bottom: 0;
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z-index: $zindex-sticky;
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}
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}
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}
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@ -159,7 +159,8 @@
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margin: -1rem -1rem 1rem;
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}
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.fixed-bottom {
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.fixed-bottom,
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.sticky-bottom {
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position: static;
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margin: 1rem -1rem -1rem;
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}
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@ -169,7 +170,8 @@
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.sticky-top {
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margin: -1.5rem -1.5rem 1rem;
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}
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.fixed-bottom {
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.fixed-bottom,
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.sticky-bottom {
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margin: 1rem -1.5rem -1.5rem;
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}
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}
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@ -450,9 +450,9 @@ Use any of the responsive containers to change how wide the content in your navb
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## Placement
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Use our [position utilities]({{< docsref "/utilities/position" >}}) to place navbars in non-static positions. Choose from fixed to the top, fixed to the bottom, or stickied to the top (scrolls with the page until it reaches the top, then stays there). Fixed navbars use `position: fixed`, meaning they're pulled from the normal flow of the DOM and may require custom CSS (e.g., `padding-top` on the `<body>`) to prevent overlap with other elements.
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Use our [position utilities]({{< docsref "/utilities/position" >}}) to place navbars in non-static positions. Choose from fixed to the top, fixed to the bottom, stickied to the top (scrolls with the page until it reaches the top, then stays there), or stickied to the bottom (scrolls with the page until it reaches the bottom, then stays there).
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Also note that **`.sticky-top` uses `position: sticky`, which [isn't fully supported in every browser](https://caniuse.com/css-sticky)**.
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Fixed navbars use `position: fixed`, meaning they're pulled from the normal flow of the DOM and may require custom CSS (e.g., `padding-top` on the `<body>`) to prevent overlap with other elements.
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{{< example >}}
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<nav class="navbar navbar-light bg-light">
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@ -486,6 +486,14 @@ Also note that **`.sticky-top` uses `position: sticky`, which [isn't fully suppo
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</nav>
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{{< /example >}}
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{{< example >}}
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<nav class="navbar sticky-bottom navbar-light bg-light">
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<div class="container-fluid">
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<a class="navbar-brand" href="#">Sticky bottom</a>
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</div>
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</nav>
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{{< /example >}}
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## Scrolling
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Add `.navbar-nav-scroll` to a `.navbar-nav` (or other navbar sub-component) to enable vertical scrolling within the toggleable contents of a collapsed navbar. By default, scrolling kicks in at `75vh` (or 75% of the viewport height), but you can override that with the local CSS custom property `--bs-navbar-height` or custom styles. At larger viewports when the navbar is expanded, content will appear as it does in a default navbar.
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@ -24,7 +24,7 @@ Position an element at the bottom of the viewport, from edge to edge. Be sure yo
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## Sticky top
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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.
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Position an element at the top of the viewport, from edge to edge, but only after you scroll past it.
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```html
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<div class="sticky-top">...</div>
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@ -40,3 +40,22 @@ Responsive variations also exist for `.sticky-top` utility.
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<div class="sticky-lg-top">Stick to the top on viewports sized LG (large) or wider</div>
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<div class="sticky-xl-top">Stick to the top on viewports sized XL (extra-large) or wider</div>
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```
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## Sticky bottom
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Position an element at the bottom of the viewport, from edge to edge, but only after you scroll past it.
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```html
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<div class="sticky-bottom">...</div>
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```
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## Responsive sticky bottom
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Responsive variations also exist for `.sticky-bottom` utility.
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```html
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<div class="sticky-sm-bottom">Stick to the bottom on viewports sized SM (small) or wider</div>
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<div class="sticky-md-bottom">Stick to the bottom on viewports sized MD (medium) or wider</div>
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<div class="sticky-lg-bottom">Stick to the bottom on viewports sized LG (large) or wider</div>
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<div class="sticky-xl-bottom">Stick to the bottom on viewports sized XL (extra-large) or wider</div>
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```
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