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Add note to checkbox def #1657

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Dec 9, 2021
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Add note to checkbox def #1657

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Expand Up @@ -1990,6 +1990,9 @@ <h2>Definition of Roles</h2>
<div class="role-description">
<p>A checkable input that has three possible <span>values</span>: <code>true</code>, <code>false</code>, or <code>mixed</code>.</p>
<p>The <sref>aria-checked</sref> <a>attribute</a> of a <code>checkbox</code> indicates whether the input is checked (<code>true</code>), unchecked (<code>false</code>), or represents a group of <a>elements</a> that have a mixture of checked and unchecked values (<code>mixed</code>). Many checkboxes do not use the <code>mixed</code> value, and thus are effectively boolean checkboxes.</p>
<p class="note">
Due to the strong native semantics of HTML's native checkbox, authors are advised against using <code>aria-checked</code> on an <code>input type=checkbox</code>. Rather, use the native <code>checked</code> attribute or the <code>indeterminate</code> IDL attribute to specify the checkbox's "checked" or "mixed" state, respectively.
</p>
</div>
<table class="role-features">
<caption>Characteristics:</caption>
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