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Extra position utilities (#31280)

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* 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>
This commit is contained in:
Jaume Sala
2020-09-21 04:42:41 +02:00
committed by GitHub
parent 4e9a29e47a
commit 7bbfd439c9
4 changed files with 140 additions and 1 deletions
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23
scss/_utilities.scss
View File

@@ -39,6 +39,29 @@ $utilities: map-merge(
property: position, property: position,
values: static relative absolute fixed sticky values: static relative absolute fixed sticky
), ),
"top": (
property: top,
values: $position-values
),
"bottom": (
property: bottom,
values: $position-values
),
"left": (
property: left,
values: $position-values
),
"right": (
property: right,
values: $position-values
),
"translate-middle": (
property: transform,
class: translate-middle,
values: (
null: (translateX(-50%) translateY(-50%))
)
),
"border": ( "border": (
property: border, property: border,
values: ( values: (

11
scss/_variables.scss
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@@ -246,6 +246,17 @@ $spacers: (
$negative-spacers: if($enable-negative-margins, negativify-map($spacers), null) !default; $negative-spacers: if($enable-negative-margins, negativify-map($spacers), null) !default;
// Position
//
// Define the edge positioning anchors of the position utilities.
$position-values: (
0: 0,
50: 50%,
100: 100%
) !default;
// Body // Body
// //
// Settings for the `<body>` element. // Settings for the `<body>` element.

23
site/assets/scss/_component-examples.scss
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@@ -217,6 +217,29 @@
} }
} }
.bd-example-position-utils {
position: relative;
padding: 3em;
.position-relative {
height: 200px;
background-color: #f5f5f5;
}
.position-absolute {
width: 2em;
height: 2em;
background-color: $dark;
@include border-radius();
}
}
.bd-example-position-examples {
&::after {
content: none;
}
}
// //
// Code snippets // Code snippets
// //

84
site/content/docs/5.0/utilities/position.md
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@@ -6,7 +6,7 @@ group: utilities
toc: true toc: true
--- ---
## Common values ## Position values
Quick positioning classes are available, though they are not responsive. Quick positioning classes are available, though they are not responsive.
@@ -17,3 +17,85 @@ Quick positioning classes are available, though they are not responsive.
<div class="position-fixed">...</div> <div class="position-fixed">...</div>
<div class="position-sticky">...</div> <div class="position-sticky">...</div>
{{< /highlight >}} {{< /highlight >}}
## Arrange elements
Arrange elements easily with the edge positioning utilities. The format is `{property}-{position}`.
Where *property* is one of:
- `top` - for the vertical `top` position
- `left` - for the horizontal `left` position
- `bottom` - for the vertical `bottom` position
- `right` - for the horizontal `right` position
Where *position* is one of:
- `0` - for `0` edge position
- `50` - for `50%` edge position
- `100` - for `100%` edge position
(You can add more position values by adding entries to the `$position-values` Sass map variable.)
{{< example class="bd-example-position-utils" >}}
<div class="position-relative">
<div class="position-absolute top-0 left-0"></div>
<div class="position-absolute top-0 right-0"></div>
<div class="position-absolute top-50 left-50"></div>
<div class="position-absolute bottom-50 right-50"></div>
<div class="position-absolute bottom-0 left-0"></div>
<div class="position-absolute bottom-0 right-0"></div>
</div>
{{< /example >}}
## Center elements
In addition, you can also center the elements with the transform utility class `.translate-middle`.
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.
{{< example class="bd-example-position-utils" >}}
<div class="position-relative">
<div class="position-absolute top-0 left-0 translate-middle"></div>
<div class="position-absolute top-0 left-50 translate-middle"></div>
<div class="position-absolute top-0 left-100 translate-middle"></div>
<div class="position-absolute top-50 left-0 translate-middle"></div>
<div class="position-absolute top-50 left-50 translate-middle"></div>
<div class="position-absolute top-50 left-100 translate-middle"></div>
<div class="position-absolute top-100 left-0 translate-middle"></div>
<div class="position-absolute top-100 left-50 translate-middle"></div>
<div class="position-absolute top-100 left-100 translate-middle"></div>
</div>
{{< /example >}}
## Examples
Here are some real life examples of these classes:
{{< example class="bd-example-position-examples d-flex justify-content-around" >}}
<button type="button" class="btn btn-primary position-relative">
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>
</button>
<button type="button" class="btn btn-dark position-relative">
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>
</button>
<button type="button" class="btn btn-primary position-relative">
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>
</button>
{{< /example >}}
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.
{{< example class="bd-example-position-examples" >}}
<div class="position-relative m-4">
<div class="progress" style="height: 1px;">
<div class="progress-bar" role="progressbar" style="width: 50%;" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100"></div>
</div>
<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>
<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>
<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>
</div>
{{< /example >}}