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mirror of https://github.com/tenrok/bootstrap.git synced 2026-06-14 18:42:30 +03:00

SVG accessibility fixes (#27826)

* SVG accessibility fixes

- add `focusable="false"` to all SVGs, to stop IE from including the `<svg>` in its default focus cycle
- completely hide decorative SVGs using `aria-hidden="true"`
- add `role="img"` to meaningful/"content" SVGs, ensure they have an appropriate `<title>` and/or `aria-label`
- simplify placeholder default title

* Simplify usage of placeholder.svg in the docs

- in most cases, no need for separate/redundant text and title (now that we make text itself part of the alternative text explicitly)
- no need (expect in rare cirumstances) to describe the placeholder image (unless the look of the image is important/the actual content, as is the case with the image thumbnail class)

* Simplify example.html rewriting of <svg> to <img> code sample

- as the `alt` for the placeholder isn't really important, just add an ellipsis instead (otherwise, to be correct, we'd have to construct the whole "title+text" construct like we do now in the
placeholder.svg itself

* Change svgo configuration to retain role attribute and add/force focusable=false

- regarding `focusable=false`, see https://github.com/svg/svgo/issues/1011 (which would be the "proper" SVGO fix) and the (hacky) solution https://github.com/svg/svgo/pull/817
This commit is contained in:
Patrick H. Lauke
2018-12-13 13:09:47 +00:00
committed by GitHub
parent 375d137561
commit c031584bcd
25 changed files with 94 additions and 92 deletions
+1 -1
View File
@@ -26,7 +26,7 @@ extra_css: "album.css"
<div class="navbar navbar-dark bg-dark shadow-sm">
<div class="container d-flex justify-content-between">
<a href="#" class="navbar-brand d-flex align-items-center">
<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="mr-2"><path d="M23 19a2 2 0 0 1-2 2H3a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h4l2-3h6l2 3h4a2 2 0 0 1 2 2z"></path><circle cx="12" cy="13" r="4"></circle></svg>
<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="mr-2" focusable="false" aria-hidden="true"><path d="M23 19a2 2 0 0 1-2 2H3a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h4l2-3h6l2 3h4a2 2 0 0 1 2 2z"></path><circle cx="12" cy="13" r="4"></circle></svg>
<strong>Album</strong>
</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarHeader" aria-controls="navbarHeader" aria-expanded="false" aria-label="Toggle navigation">
+3 -3
View File
@@ -17,7 +17,7 @@ extra_css:
</div>
<div class="col-4 d-flex justify-content-end align-items-center">
<a class="text-muted" href="#">
<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="mx-3"><circle cx="10.5" cy="10.5" r="7.5"></circle><line x1="21" y1="21" x2="15.8" y2="15.8"></line></svg>
<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="mx-3" focusable="false" role="img"><title>Search</title><circle cx="10.5" cy="10.5" r="7.5"></circle><line x1="21" y1="21" x2="15.8" y2="15.8"></line></svg>
</a>
<a class="btn btn-sm btn-outline-secondary" href="#">Sign up</a>
</div>
@@ -61,7 +61,7 @@ extra_css:
<p class="card-text mb-auto">This is a wider card with supporting text below as a natural lead-in to additional content.</p>
<a href="#">Continue reading</a>
</div>
{% include icons/placeholder.svg width="200" height="250" background="#55595c" color="#eceeef" class="card-img-right flex-auto d-none d-lg-block" text="Thumbnail" title="Card image cap" %}
{% include icons/placeholder.svg width="200" height="250" background="#55595c" color="#eceeef" class="card-img-right flex-auto d-none d-lg-block" text="Thumbnail" %}
</div>
</div>
<div class="col-md-6">
@@ -75,7 +75,7 @@ extra_css:
<p class="card-text mb-auto">This is a wider card with supporting text below as a natural lead-in to additional content.</p>
<a href="#">Continue reading</a>
</div>
{% include icons/placeholder.svg width="200" height="250" background="#55595c" color="#eceeef" class="card-img-right flex-auto d-none d-lg-block" text="Thumbnail" title="Card image cap" %}
{% include icons/placeholder.svg width="200" height="250" background="#55595c" color="#eceeef" class="card-img-right flex-auto d-none d-lg-block" text="Thumbnail" %}
</div>
</div>
</div>
+6 -6
View File
@@ -90,19 +90,19 @@ extra_css: "carousel.css"
<!-- Three columns of text below the carousel -->
<div class="row">
<div class="col-lg-4">
{% include icons/placeholder.svg width="140" height="140" background="#777" color="#777" class="rounded-circle" text=" " title="Generic placeholder image" %}
{% include icons/placeholder.svg width="140" height="140" background="#777" color="#777" class="rounded-circle" %}
<h2>Heading</h2>
<p>Donec sed odio dui. Etiam porta sem malesuada magna mollis euismod. Nullam id dolor id nibh ultricies vehicula ut id elit. Morbi leo risus, porta ac consectetur ac, vestibulum at eros. Praesent commodo cursus magna.</p>
<p><a class="btn btn-secondary" href="#" role="button">View details &raquo;</a></p>
</div><!-- /.col-lg-4 -->
<div class="col-lg-4">
{% include icons/placeholder.svg width="140" height="140" background="#777" color="#777" class="rounded-circle" text=" " title="Generic placeholder image" %}
{% include icons/placeholder.svg width="140" height="140" background="#777" color="#777" class="rounded-circle" %}
<h2>Heading</h2>
<p>Duis mollis, est non commodo luctus, nisi erat porttitor ligula, eget lacinia odio sem nec elit. Cras mattis consectetur purus sit amet fermentum. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh.</p>
<p><a class="btn btn-secondary" href="#" role="button">View details &raquo;</a></p>
</div><!-- /.col-lg-4 -->
<div class="col-lg-4">
{% include icons/placeholder.svg width="140" height="140" background="#777" color="#777" class="rounded-circle" text=" " title="Generic placeholder image" %}
{% include icons/placeholder.svg width="140" height="140" background="#777" color="#777" class="rounded-circle" %}
<h2>Heading</h2>
<p>Donec sed odio dui. Cras justo odio, dapibus ac facilisis in, egestas eget quam. Vestibulum id ligula porta felis euismod semper. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus.</p>
<p><a class="btn btn-secondary" href="#" role="button">View details &raquo;</a></p>
@@ -120,7 +120,7 @@ extra_css: "carousel.css"
<p class="lead">Donec ullamcorper nulla non metus auctor fringilla. Vestibulum id ligula porta felis euismod semper. Praesent commodo cursus magna, vel scelerisque nisl consectetur. Fusce dapibus, tellus ac cursus commodo.</p>
</div>
<div class="col-md-5">
{% include icons/placeholder.svg width="500" height="500" background="#eee" color="#aaa" class="bd-placeholder-img-lg featurette-image img-fluid mx-auto" title="Generic placeholder image" %}
{% include icons/placeholder.svg width="500" height="500" background="#eee" color="#aaa" class="bd-placeholder-img-lg featurette-image img-fluid mx-auto" %}
</div>
</div>
@@ -132,7 +132,7 @@ extra_css: "carousel.css"
<p class="lead">Donec ullamcorper nulla non metus auctor fringilla. Vestibulum id ligula porta felis euismod semper. Praesent commodo cursus magna, vel scelerisque nisl consectetur. Fusce dapibus, tellus ac cursus commodo.</p>
</div>
<div class="col-md-5 order-md-1">
{% include icons/placeholder.svg width="500" height="500" background="#eee" color="#aaa" class="bd-placeholder-img-lg featurette-image img-fluid mx-auto" title="Generic placeholder image" %}
{% include icons/placeholder.svg width="500" height="500" background="#eee" color="#aaa" class="bd-placeholder-img-lg featurette-image img-fluid mx-auto" %}
</div>
</div>
@@ -144,7 +144,7 @@ extra_css: "carousel.css"
<p class="lead">Donec ullamcorper nulla non metus auctor fringilla. Vestibulum id ligula porta felis euismod semper. Praesent commodo cursus magna, vel scelerisque nisl consectetur. Fusce dapibus, tellus ac cursus commodo.</p>
</div>
<div class="col-md-5">
{% include icons/placeholder.svg width="500" height="500" background="#eee" color="#aaa" class="bd-placeholder-img-lg featurette-image img-fluid mx-auto" title="Generic placeholder image" %}
{% include icons/placeholder.svg width="500" height="500" background="#eee" color="#aaa" class="bd-placeholder-img-lg featurette-image img-fluid mx-auto" %}
</div>
</div>
+2 -2
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@@ -7,7 +7,7 @@ extra_css: "product.css"
<nav class="site-header sticky-top py-1">
<div class="container d-flex flex-column flex-md-row justify-content-between">
<a class="py-2" href="#">
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="d-block mx-auto"><circle cx="12" cy="12" r="10"></circle><line x1="14.31" y1="8" x2="20.05" y2="17.94"></line><line x1="9.69" y1="8" x2="21.17" y2="8"></line><line x1="7.38" y1="12" x2="13.12" y2="2.06"></line><line x1="9.69" y1="16" x2="3.95" y2="6.06"></line><line x1="14.31" y1="16" x2="2.83" y2="16"></line><line x1="16.62" y1="12" x2="10.88" y2="21.94"></line></svg>
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="d-block mx-auto" focusable="false" role="img"><title>Product</title><circle cx="12" cy="12" r="10"></circle><line x1="14.31" y1="8" x2="20.05" y2="17.94"></line><line x1="9.69" y1="8" x2="21.17" y2="8"></line><line x1="7.38" y1="12" x2="13.12" y2="2.06"></line><line x1="9.69" y1="16" x2="3.95" y2="6.06"></line><line x1="14.31" y1="16" x2="2.83" y2="16"></line><line x1="16.62" y1="12" x2="10.88" y2="21.94"></line></svg>
</a>
<a class="py-2 d-none d-md-inline-block" href="#">Tour</a>
<a class="py-2 d-none d-md-inline-block" href="#">Product</a>
@@ -100,7 +100,7 @@ extra_css: "product.css"
<footer class="container py-5">
<div class="row">
<div class="col-12 col-md">
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="d-block mb-2"><circle cx="12" cy="12" r="10"></circle><line x1="14.31" y1="8" x2="20.05" y2="17.94"></line><line x1="9.69" y1="8" x2="21.17" y2="8"></line><line x1="7.38" y1="12" x2="13.12" y2="2.06"></line><line x1="9.69" y1="16" x2="3.95" y2="6.06"></line><line x1="14.31" y1="16" x2="2.83" y2="16"></line><line x1="16.62" y1="12" x2="10.88" y2="21.94"></line></svg>
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="d-block mb-2" focusable="false" role="img"><title>Product</title><circle cx="12" cy="12" r="10"></circle><line x1="14.31" y1="8" x2="20.05" y2="17.94"></line><line x1="9.69" y1="8" x2="21.17" y2="8"></line><line x1="7.38" y1="12" x2="13.12" y2="2.06"></line><line x1="9.69" y1="16" x2="3.95" y2="6.06"></line><line x1="14.31" y1="16" x2="2.83" y2="16"></line><line x1="16.62" y1="12" x2="10.88" y2="21.94"></line></svg>
<small class="d-block mb-3 text-muted">&copy; 2017-2018</small>
</div>
<div class="col-6 col-md">