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Rewrite progress component without <progress> element

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- <progress> element didn't allow animation, labels overlaid, multiple bars, etc.

- Revamps CSS to use something more similar to v3's implementation

- Ditches variant mixin for `bg-` utils

- Rebuilds docs to match, including adding a new Height section for customizing that.

Only potential remaining todo is adding `.sr-only` instances to within the bar. Unsure if that's necessary.
This commit is contained in:
Mark Otto
2016-12-29 14:56:28 -08:00
committed by Mark Otto
parent 92fa9b2256
commit a0141aa38e
5 changed files with 124 additions and 147 deletions
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docs/components/progress.md
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@@ -5,71 +5,139 @@ description: Documentation and examples for using Bootstrap progress bars.
group: components
---
Stylize [the HTML5 `<progress>` element](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/progress) with a few extra classes and some crafty browser-specific CSS. Be sure to read up on the browser support.
Use our custom progress component for displaying simple or complex progress bars. We don't use [the HTML5 `<progress>` element](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/progress), ensuring you can stack progress bars, animate them, and place text labels over them.
## Contents
* Will be replaced with the ToC, excluding the "Contents" header
{:toc}
## Example
## How it works
To caption a progress bar, simply add a `<div>` with your caption text, [align the text using a utility class]({{ site.baseurl }}/utilities/typography/#text-alignment), and associate the caption with the `<progress>` element using the `aria-describedby` attribute.
Progress components are built with two HTML elements, some CSS to set the width, and a few attributes.
- We use the `.progress` as a wrapper to indicate the max value of the progress bar.
- We use the inner `.progress-bar` to indicate the progress so far.
- The `.progress-bar` requires an inline style or custom CSS to set their width.
- The `.progress-bar` also requires some `role` and `aria` attributes to make it accessible.
Put that all together, and you have the following examples.
{% example html %}
<div class="text-center" id="example-caption-1">Reticulating splines&hellip; 0%</div>
<progress class="progress" value="0" max="100" aria-describedby="example-caption-1"></progress>
<div class="text-center" id="example-caption-2">Reticulating splines&hellip; 25%</div>
<progress class="progress" value="25" max="100" aria-describedby="example-caption-2"></progress>
<div class="text-center" id="example-caption-3">Reticulating splines&hellip; 50%</div>
<progress class="progress" value="50" max="100" aria-describedby="example-caption-3"></progress>
<div class="text-center" id="example-caption-4">Reticulating splines&hellip; 75%</div>
<progress class="progress" value="75" max="100" aria-describedby="example-caption-4"></progress>
<div class="text-center" id="example-caption-5">Reticulating splines&hellip; 100%</div>
<progress class="progress" value="100" max="100" aria-describedby="example-caption-5"></progress>
<div class="progress">
<div class="progress-bar" role="progressbar" aria-valuenow="0" aria-valuemin="0" aria-valuemax="100"></div>
</div>
<div class="progress">
<div class="progress-bar" role="progressbar" style="width: 25%" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100"></div>
</div>
<div class="progress">
<div class="progress-bar" role="progressbar" style="width: 50%" aria-valuenow="50" aria-valuemin="0" aria-valuemax="100"></div>
</div>
<div class="progress">
<div class="progress-bar" role="progressbar" style="width: 75%" aria-valuenow="75" aria-valuemin="0" aria-valuemax="100"></div>
</div>
<div class="progress">
<div class="progress-bar" role="progressbar" style="width: 100%" aria-valuenow="100" aria-valuemin="0" aria-valuemax="100"></div>
</div>
{% endexample %}
## Contextual alternatives
## Customizing
Progress bars use some of the same button and alert classes for consistent styles.
Customize the appearance of your progress bars with custom CSS, background utilities, stripes, and more.
### Labels
Add labels to your progress bars by placing text within the `.progress-bar`.
{% example html %}
<progress class="progress progress-success" value="25" max="100"></progress>
<progress class="progress progress-info" value="50" max="100"></progress>
<progress class="progress progress-warning" value="75" max="100"></progress>
<progress class="progress progress-danger" value="100" max="100"></progress>
<div class="progress">
<div class="progress-bar" role="progressbar" style="width: 25%;" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100">25%</div>
</div>
{% endexample %}
### Height
We only set a `height` value on the `.progress-bar`, so if you change that value the outer `.progress` will automatically resize accordingly.
{% example html %}
<div class="progress">
<div class="progress-bar" role="progressbar" style="width: 25%; height: 1px;" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100"></div>
</div>
<div class="progress">
<div class="progress-bar" role="progressbar" style="width: 25%; height: 20px;" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100"></div>
</div>
{% endexample %}
### Backgrounds
Use background utility classes to change the appearance of individual progress bars.
{% example html %}
<div class="progress">
<div class="progress-bar bg-success" role="progressbar" style="width: 25%" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100"></div>
</div>
<div class="progress">
<div class="progress-bar bg-info" role="progressbar" style="width: 50%" aria-valuenow="50" aria-valuemin="0" aria-valuemax="100"></div>
</div>
<div class="progress">
<div class="progress-bar bg-warning" role="progressbar" style="width: 75%" aria-valuenow="75" aria-valuemin="0" aria-valuemax="100"></div>
</div>
<div class="progress">
<div class="progress-bar bg-danger" role="progressbar" style="width: 100%" aria-valuenow="100" aria-valuemin="0" aria-valuemax="100"></div>
</div>
{% endexample %}
### Multiple bars
Include multiple progress bars in a progress component if you need.
{% example html %}
<div class="progress">
<div class="progress-bar" role="progressbar" style="width: 15%" aria-valuenow="15" aria-valuemin="0" aria-valuemax="100"></div>
<div class="progress-bar bg-success" role="progressbar" style="width: 30%" aria-valuenow="30" aria-valuemin="0" aria-valuemax="100"></div>
<div class="progress-bar bg-info" role="progressbar" style="width: 20%" aria-valuenow="20" aria-valuemin="0" aria-valuemax="100"></div>
</div>
{% endexample %}
### Striped
Uses a gradient to create a striped effect.
Add `.progress-bar-striped` to any `.progress-bar` to apply a stripe via CSS gradient over the progress bar's background color.
{% example html %}
<progress class="progress progress-striped" value="10" max="100"></progress>
<progress class="progress progress-striped progress-success" value="25" max="100"></progress>
<progress class="progress progress-striped progress-info" value="50" max="100"></progress>
<progress class="progress progress-striped progress-warning" value="75" max="100"></progress>
<progress class="progress progress-striped progress-danger" value="100" max="100"></progress>
<div class="progress">
<div class="progress-bar progress-bar-striped" role="progressbar" style="width: 10%" aria-valuenow="10" aria-valuemin="0" aria-valuemax="100"></div>
</div>
<div class="progress">
<div class="progress-bar progress-bar-striped bg-success" role="progressbar" style="width: 25%" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100"></div>
</div>
<div class="progress">
<div class="progress-bar progress-bar-striped bg-info" role="progressbar" style="width: 50%" aria-valuenow="50" aria-valuemin="0" aria-valuemax="100"></div>
</div>
<div class="progress">
<div class="progress-bar progress-bar-striped bg-warning" role="progressbar"style="width: 75%" aria-valuenow="75" aria-valuemin="0" aria-valuemax="100" ></div>
</div>
<div class="progress">
<div class="progress-bar progress-bar-striped bg-danger" role="progressbar" style="width: 100%" aria-valuenow="100" aria-valuemin="0" aria-valuemax="100"></div>
</div>
{% endexample %}
### Animated stripes
The striped gradient can also be animated. Add `.progress-animated` to `.progress` to animate the stripes right to left via CSS3 animations.
The striped gradient can also be animated. Add `.progress-bar-animated` to `.progress-bar` to animate the stripes right to left via CSS3 animations.
**Animated progress bars don't work in Opera 12**—as they don't support CSS3 animations. They also **don't work in IE10+ and Microsoft Edge** as those browsers currently don't support CSS3 animations on the [`::-ms-fill` pseudo-element](https://msdn.microsoft.com/en-us/library/windows/apps/hh465757.aspx).
**Animated progress bars don't work in Opera 12**—as they don't support CSS3 animations.
<div class="bd-example">
<progress class="progress progress-striped" value="25" max="100"></progress>
<button type="button" class="btn btn-secondary bd-activate-animated-progressbar" data-toggle="button" aria-pressed="false" autocomplete="off">
<div class="progress">
<div class="progress-bar progress-bar-striped" role="progressbar" aria-valuenow="75" aria-valuemin="0" aria-valuemax="100" style="width: 75%"></div>
</div>
<button type="button" class="btn btn-secondary bd-toggle-animated-progress" data-toggle="button" aria-pressed="false" autocomplete="off">
Toggle animation
</button>
</div>
{% highlight html %}
<progress class="progress progress-striped progress-animated" value="25" max="100"></progress>
<div class="progress">
<div class="progress-bar progress-bar-striped progress-bar-animated" role="progressbar" aria-valuenow="75" aria-valuemin="0" aria-valuemax="100" style="width: 75%"></div>
</div>
{% endhighlight %}