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Editorial: clarify meaning of iframe allow attribute #11917

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Editorial: clarify meaning of iframe allow attribute #11917

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Expand Up @@ -35276,12 +35276,13 @@ interface <dfn interface>HTMLIFrameElement</dfn> : <span>HTMLElement</span> {
<hr> <!-- FEATURE POLICY ATTRIBUTES: ALLOW; ALLOW FULLSCREEN / PAYMENT REQUEST / USER MEDIA -->

<p>The <dfn element-attr for="iframe"><code data-x="attr-iframe-allow">allow</code></dfn>
attribute, when specified, determines the <span data-x="concept-container-policy">container
policy</span> that will be used when the <span
data-x="concept-document-permissions-policy">permissions policy</span> for a
<code>Document</code> in the <code>iframe</code>'s <span>content navigable</span> is initialized.
Its value must be a <span data-x="concept-serialized-permissions-policy">serialized permissions
policy</span>. <ref>PERMISSIONSPOLICY</ref></p>
attribute, when specified, defines the <span data-x="concept-container-policy">container
policy</span> that applies to the iframe and determines the <span
data-x="concept-document-permissions-policy">permissions policy</span> that will be enforced when
the nested <code>Document</code> in the <code>iframe</code>'s <span>content navigable</span> is
initialized. Its value must be a <span data-x="concept-serialized-permissions-policy">serialized
permissions policy</span>. <ref>PERMISSIONSPOLICY</ref></p>


<div class="example">
<p>In this example, an <code>iframe</code> is used to embed a map from an online navigation
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