<p></p>
<p><b>@kcne</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/openstreetmap/openstreetmap-website/pull/5402#discussion_r1928941127">app/assets/javascripts/heatmap.js</a>:</p>
<pre style='color:#555'>> +//= require popper
+//= require tooltip
+
+
+/* global CalHeatmap, CalendarLabel, Tooltip */
+document.addEventListener("DOMContentLoaded", () => {
+  const heatmapElement = document.querySelector("#cal-heatmap");
+
+  if (!heatmapElement) {
+    console.warn("Heatmap element not found in the DOM.");
+    return;
+  }
+
+  const heatmapData = heatmapElement.dataset.heatmap ? JSON.parse(heatmapElement.dataset.heatmap) : [];
+  const colorScheme = heatmapElement.dataset.siteColorScheme || "auto";
+  const locale = $("head").data().locale;
</pre>
<p dir="auto">I noticed you opened <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="2805957338" data-permission-text="Title is private" data-url="https://github.com/openstreetmap/openstreetmap-website/issues/5538" data-hovercard-type="pull_request" data-hovercard-url="/openstreetmap/openstreetmap-website/pull/5538/hovercard" href="https://github.com/openstreetmap/openstreetmap-website/pull/5538">#5538</a>. Are the changes there related to the initialization concerns mentioned here?</p>
<p dir="auto">Regarding delaying the heatmap or using a turbo frame/collapsible section for performance, I’m not sure about the best metrics to determine what's acceptable in terms of load time/size or resource usage. Here's the network tab from Chrome when testing locally with the cache disabled:</p>
<p dir="auto"><a href="https://github.com/user-attachments/assets/df1b8c92-ec1c-4ac8-a88e-6a17c2050a5d">Screenshot.2025-01-24.at.17.20.16.png (view on web)</a></p>
<p dir="auto">If there are specific metrics or scenarios you'd recommend testing to ensure this is performant and I18n is properly initialized, I’d be happy to try those out.</p>
<p dir="auto">Thank you.</p>

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