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[mediaqueries-5] Add prefers-shapes media query #9036

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[mediaqueries-5] Add prefers-shapes media query #9036

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35 changes: 33 additions & 2 deletions mediaqueries-5/Overview.bs
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Expand Up @@ -157,8 +157,9 @@ Prefers-* Media Features Security and Privacy</h3>
User agents and developers implementing this
specification need to be aware of this vector and take it
into consideration when deciding whether to use the feature.
Specifically `prefers-reduced-motion`, `prefers-color-scheme` and
`prefers-reduced-data` are currently of concern for exploitation.
Specifically `prefers-reduced-motion`, `prefers-color-scheme`,
`prefers-reduced-data`, `prefers-reduced-transparency` and `prefers-shapes` are currently of concern for
exploitation.
</div>

<!--
Expand Down Expand Up @@ -3141,6 +3142,36 @@ Detecting the desire for reduced data usage when loading a page: the 'prefers-re
</pre>
</div>

<h3 id="prefers-shapes">
Detecting the desire for conveying information through shapes instead of using color alone: the 'prefers-shapes' feature</h3>

<pre class='descdef mq'>
Name: prefers-shapes
Value: no-preference | active
For: @media
Type: discrete
</pre>

The 'prefers-shapes' media feature is used to detect if the user
has a preference for information to be conveyed using shapes instead
of color alone.

<dl dfn-type=value dfn-for="@media/prefers-shapes">
<dt><dfn>no-preference</dfn>
<dd>
Indicates that the user has made no preference known
to the system. This keyword value evaluates as false
in the <a>boolean context</a>.

<dt><dfn>active</dfn>
<dd>
Indicates that user has expressed a preference.
</dl>

The method by which the user expresses their preference can vary.
It might be a system-wide setting exposed by the Operating System,
or a setting controlled by the user agent.

<h3 id=auto-pref>
Automatic handling of User Preferences</h3>

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