7.3 KiB
Primer CSS Popover
Popover for suggesting, guiding, and bringing attention to specific UI elements on a page.
This repository is a module of the full primer-css repository.
Install
This repository is distributed with npm. After installing npm, you can install primer-popover with this command.
$ npm install --save primer-popover
Usage
The source files included are written in Sass (SCSS) You can simply point your sass include-path at your node_modules directory and import it like this.
@import "primer-popover/index.scss";
You can also import specific portions of the module by importing those partials from the /lib/ folder. Make sure you import any requirements along with the modules.
Build
For a compiled CSS version of this module, an npm script is included that will output a css version to build/build.css The built css file is also included in the npm package:
$ npm run build
Documentation
Popovers are used to bring attention to specific user interface elements, typically to suggest an action or to guide users through a new experience.
{:toc}
Popover's consist of:
- The block element,
.Popover, which simply positions its content absolutely atop other body content. - The child element,
.Popover-message, which contains the markup for the intended messaging and the visual "caret."
In the examples below, Popover-message, in particular, uses a handful of utility classes to style it appropriately. And these are intended to demonstrate the default, go-to presentation for the popover's message. By default, the message's caret is centered on the top edge of the message.
The Popover-message element also supports several modifiers, most of which position the caret differently:
.Popover-message--top(default): Places the caret on the top edge of the message, horizontally centered..Popover-message--bottom: Places the caret on the bottom edge of the message, horizontally centered..Popover-message--right: Places the caret on the right edge of the message, vertically centered..Popover-message--left: Places the caret on the left edge of the message, vertically centered.
Each of these modifiers also support a syntax for adjusting the positioning the caret to the right, left, top, or bottom of its respective edge. That syntax looks like:
.Popover-message--top-right.Popover-message--right-top.Popover-message--bottom-left.Popover-message--left-bottom
Lastly, there is an added .Popover-message--large modifier, which assumes a slightly wider popover message on screens wider than 544px.
Notes
The samples below include optional markup, like:
- An outermost container that establishes stacking context (e.g.
position-relative). - A choice piece of user interface (a button, in this case) to relate the popover to.
- Use of the
Detailsandjs-detailsfamily of class names, which interact with JavaScript to demonstrate dismissal of the popover by clicking the nested "Got it!" button.
Basic example
Defaults to caret oriented top-center.
<div class="position-relative text-center">
<button class="btn btn-primary">UI</button>
<div class="Popover right-0 left-0">
<div class="Popover-message text-left p-4 mt-2 mx-auto Box box-shadow-large">
<h4 class="mb-2">Popover heading</h4>
<p>Message about this particular piece of UI.</p>
<button type="submit" class="btn btn-outline mt-2 text-bold">Got it!</button>
</div>
</div>
</div>
Large example
<div class="position-relative text-center">
<button class="btn btn-primary">UI</button>
<div class="Popover right-0 left-0">
<div class="Popover-message Popover-message--large text-left p-4 mt-2 Box box-shadow-large">
<h4 class="mb-2">Popover heading</h4>
<p>Message about this particular piece of UI.</p>
<button type="submit" class="btn btn-outline mt-2 text-bold">Got it!</button>
</div>
</div>
</div>
Top-right-aligned example
<div class="position-relative text-right">
<button class="btn btn-primary">UI</button>
<div class="Popover right-0">
<div class="Popover-message Popover-message--top-right text-left p-4 mt-2 Box box-shadow-large">
<h4 class="mb-2">Popover heading</h4>
<p>Message about this particular piece of UI.</p>
<button type="submit" class="btn btn-outline mt-2 text-bold">Got it!</button>
</div>
</div>
</div>
Top-right-aligned example
<div class="position-relative">
<button class="btn btn-primary">UI</button>
<div class="Popover">
<div class="Popover-message Popover-message--top-left p-4 mt-2 Box box-shadow-large">
<h4 class="mb-2">Popover heading</h4>
<p>Message about this particular piece of UI.</p>
<button type="submit" class="btn btn-outline mt-2 text-bold">Got it!</button>
</div>
</div>
</div>
Right-aligned example
<div class="Popover">
<div class="Popover-message Popover-message--right p-4 mt-2 Box box-shadow-large">
<h4 class="mb-2">Popover heading</h4>
<p>Message about this particular piece of UI.</p>
<button type="submit" class="btn btn-outline mt-2 text-bold">Got it!</button>
</div>
</div>
Left-aligned example
<div class="Popover">
<div class="Popover-message Popover-message--left p-4 mt-2 Box box-shadow-large">
<h4 class="mb-2">Popover heading</h4>
<p>Message about this particular piece of UI.</p>
<button type="submit" class="btn btn-outline mt-2 text-bold">Got it!</button>
</div>
</div>
Bottom-aligned example
<div class="Popover">
<div class="Popover-message Popover-message--bottom p-4 mt-2 mx-auto Box box-shadow-large">
<h4 class="mb-2">Popover heading</h4>
<p>Message about this particular piece of UI.</p>
<button type="submit" class="btn btn-outline mt-2 text-bold">Got it!</button>
</div>
</div>
Bottom-right-aligned example
<div class="Popover">
<div class="Popover-message Popover-message--bottom-right p-4 mt-2 mx-auto Box box-shadow-large">
<h4 class="mb-2">Popover heading</h4>
<p>Message about this particular piece of UI.</p>
<button type="submit" class="btn btn-outline mt-2 text-bold">Got it!</button>
</div>
</div>
Bottom-left-aligned example
<div class="Popover">
<div class="Popover-message Popover-message--bottom-left p-4 mt-2 mx-auto Box box-shadow-large">
<h4 class="mb-2">Popover heading</h4>
<p>Message about this particular piece of UI.</p>
<button type="submit" class="btn btn-outline mt-2 text-bold">Got it!</button>
</div>
</div>