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Pass the correct iframe fallback URL to resource timing #12124

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Pass the correct iframe fallback URL to resource timing #12124

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deba177
Pass the correct iframe fallback URL to resource timing
noamr Feb 2, 2026
1b23437
nit
noamr Feb 16, 2026
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35 changes: 30 additions & 5 deletions source
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Original file line number Diff line number Diff line change
Expand Up @@ -34985,10 +34985,20 @@ interface <dfn interface>HTMLIFrameElement</dfn> : <span>HTMLElement</span> {
<var>historyHandling</var> to "<code
data-x="NavigationHistoryBehavior-replace">replace</code>".</p></li>

<li><p>If <var>element</var> is an <code>iframe</code>, then set <var>element</var>'s <span
data-x="iframe-pending-resource-timing-start-time">pending resource-timing start time</span> to
the <span>current high resolution time</span> given <var>element</var>'s
<span>node document</span>'s <span>relevant global object</span>.</p></li>
<li>
<p>If <var>element</var> is an <code>iframe</code>, then:<p>

<ol>
<li><p>Set <var>element</var>'s <span
data-x="iframe-pending-resource-timing-start-time">pending resource-timing start time</span> to
the <span>current high resolution time</span> given <var>element</var>'s
<span>node document</span>'s <span>relevant global object</span>.</p></li>

<li><p>Set <var>element</var>'s <span
data-x="iframe-pending-resource-timing-url">pending resource-timing URL</span> to
<var>url</var>.</p></li>
</ol>
</li>

<li><p><span>Navigate</span><!--DONAV iframe or frame--> <var>element</var>'s <span>content
navigable</span> to <var>url</var> using <var>element</var>'s <span>node document</span>, with
Expand Down Expand Up @@ -35023,6 +35033,10 @@ interface <dfn interface>HTMLIFrameElement</dfn> : <span>HTMLElement</span> {
not null, then:</p>

<ol>
<li><p><span>Assert</span>: <var>element</var>'s <span
data-x="iframe-pending-resource-timing-url">pending resource-timing URL</span> is not
null.</p></li>

<li><p>Let <var>global</var> be <var>element</var>'s <span>node document</span>'s
<span>relevant global object</span>.</p></li>

Expand All @@ -35033,13 +35047,19 @@ interface <dfn interface>HTMLIFrameElement</dfn> : <span>HTMLElement</span> {
and whose <span data-x="fetch-timing-info-end-time">response end time</span> is the
<span>current high resolution time</span> given <var>global</var>.</p></li>

<li><p><span>Mark resource timing</span> given <var>fallbackTimingInfo</var>, <var>url</var>,
<li><p><span>Mark resource timing</span> given <var>fallbackTimingInfo</var>,
the result of <span data-x="parse a URL">parsing</span> <var>element</var>'s <span
data-x="iframe-pending-resource-timing-url">pending resource-timing URL</span>,
"<code>iframe</code>", <var>global</var>, the empty string, a new
<span data-x="response-body-info">response body info</span>, and 0.</p></li>

<li><p>Set <var>element</var>'s <span
data-x="iframe-pending-resource-timing-start-time">pending resource-timing start time</span>
to null.</p></li>

<li><p>Set <var>element</var>'s <span
data-x="iframe-pending-resource-timing-url">pending resource-timing URL</span>
to null.</p></li>
</ol>
</li>

Expand Down Expand Up @@ -35091,6 +35111,11 @@ interface <dfn interface>HTMLIFrameElement</dfn> : <span>HTMLElement</span> {
<span><code>DOMHighResTimeStamp</code></span> <dfn
data-x="iframe-pending-resource-timing-start-time">pending resource-timing start time</dfn>,
initially set to null.</p>

<p>Each <code>iframe</code> element has an associated null or
<span>URL</span> <dfn
data-x="iframe-pending-resource-timing-URL">pending resource-timing URL</dfn>, initially set to
null.</p>
</div>

<!-- END of section that's very similar to <frame> -->
Expand Down