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Extra position utilities (#31280)
* Extra position utilities Given that there are utilities for the *position* property, it seems logic to have utilities for the *top*, *left*, *bottom* and *right* propertires. * Update extra position utilities * add default position values map * tweak examples * add real life examples * fix double colon Co-authored-by: XhmikosR <xhmikosr@gmail.com>
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Jaume Sala
GitHub
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@ -39,6 +39,29 @@ $utilities: map-merge(
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property: position,
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values: static relative absolute fixed sticky
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),
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"top": (
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property: top,
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values: $position-values
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),
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"bottom": (
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property: bottom,
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values: $position-values
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),
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"left": (
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property: left,
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values: $position-values
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),
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"right": (
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property: right,
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values: $position-values
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),
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"translate-middle": (
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property: transform,
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class: translate-middle,
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values: (
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null: (translateX(-50%) translateY(-50%))
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)
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),
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"border": (
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property: border,
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values: (
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@ -246,6 +246,17 @@ $spacers: (
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$negative-spacers: if($enable-negative-margins, negativify-map($spacers), null) !default;
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// Position
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//
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// Define the edge positioning anchors of the position utilities.
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$position-values: (
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0: 0,
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50: 50%,
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100: 100%
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) !default;
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// Body
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//
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// Settings for the `<body>` element.
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@ -217,6 +217,29 @@
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}
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}
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.bd-example-position-utils {
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position: relative;
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padding: 3em;
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.position-relative {
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height: 200px;
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background-color: #f5f5f5;
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}
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.position-absolute {
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width: 2em;
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height: 2em;
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background-color: $dark;
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@include border-radius();
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}
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}
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.bd-example-position-examples {
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&::after {
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content: none;
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}
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}
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//
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// Code snippets
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//
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@ -6,7 +6,7 @@ group: utilities
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toc: true
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---
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## Common values
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## Position values
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Quick positioning classes are available, though they are not responsive.
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@ -17,3 +17,85 @@ Quick positioning classes are available, though they are not responsive.
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<div class="position-fixed">...</div>
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<div class="position-sticky">...</div>
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{{< /highlight >}}
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## Arrange elements
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Arrange elements easily with the edge positioning utilities. The format is `{property}-{position}`.
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Where *property* is one of:
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- `top` - for the vertical `top` position
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- `left` - for the horizontal `left` position
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- `bottom` - for the vertical `bottom` position
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- `right` - for the horizontal `right` position
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Where *position* is one of:
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- `0` - for `0` edge position
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- `50` - for `50%` edge position
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- `100` - for `100%` edge position
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(You can add more position values by adding entries to the `$position-values` Sass map variable.)
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{{< example class="bd-example-position-utils" >}}
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<div class="position-relative">
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<div class="position-absolute top-0 left-0"></div>
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<div class="position-absolute top-0 right-0"></div>
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<div class="position-absolute top-50 left-50"></div>
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<div class="position-absolute bottom-50 right-50"></div>
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<div class="position-absolute bottom-0 left-0"></div>
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<div class="position-absolute bottom-0 right-0"></div>
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</div>
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{{< /example >}}
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## Center elements
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In addition, you can also center the elements with the transform utility class `.translate-middle`.
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This class applies the transformations `translateX(-50%)` and `translateY(-50%)` to the element which, in combination with the edge positioning utilities, allows you to absolute center an element.
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{{< example class="bd-example-position-utils" >}}
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<div class="position-relative">
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<div class="position-absolute top-0 left-0 translate-middle"></div>
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<div class="position-absolute top-0 left-50 translate-middle"></div>
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<div class="position-absolute top-0 left-100 translate-middle"></div>
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<div class="position-absolute top-50 left-0 translate-middle"></div>
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<div class="position-absolute top-50 left-50 translate-middle"></div>
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<div class="position-absolute top-50 left-100 translate-middle"></div>
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<div class="position-absolute top-100 left-0 translate-middle"></div>
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<div class="position-absolute top-100 left-50 translate-middle"></div>
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<div class="position-absolute top-100 left-100 translate-middle"></div>
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</div>
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{{< /example >}}
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## Examples
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Here are some real life examples of these classes:
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{{< example class="bd-example-position-examples d-flex justify-content-around" >}}
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<button type="button" class="btn btn-primary position-relative">
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Mails <span class="position-absolute top-0 left-100 translate-middle badge rounded-pill bg-secondary">+99 <span class="visually-hidden">unread messages</span></span>
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</button>
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<button type="button" class="btn btn-dark position-relative">
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Marker <svg width="1em" height="1em" viewBox="0 0 16 16" class="position-absolute top-100 left-50 translate-middle mt-1 bi bi-caret-down-fill" fill="#343a40" xmlns="http://www.w3.org/2000/svg"><path d="M7.247 11.14L2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z"/></svg>
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</button>
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<button type="button" class="btn btn-primary position-relative">
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Alerts <span class="position-absolute top-0 left-100 translate-middle badge border border-light rounded-circle bg-danger p-2"><span class="visually-hidden">unread messages</span></span>
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</button>
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{{< /example >}}
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You can use these classes with existing components to create new ones. Remember that you can extend its functionality by adding entries to the `$position-values` variable.
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{{< example class="bd-example-position-examples" >}}
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<div class="position-relative m-4">
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<div class="progress" style="height: 1px;">
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<div class="progress-bar" role="progressbar" style="width: 50%;" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100"></div>
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</div>
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<button type="button" class="position-absolute top-0 left-0 translate-middle btn btn-sm btn-primary rounded-pill" style="width: 2rem; height:2rem;">1</button>
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<button type="button" class="position-absolute top-0 left-50 translate-middle btn btn-sm btn-primary rounded-pill" style="width: 2rem; height:2rem;">2</button>
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<button type="button" class="position-absolute top-0 left-100 translate-middle btn btn-sm btn-secondary rounded-pill" style="width: 2rem; height:2rem;">3</button>
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</div>
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{{< /example >}}
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