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

<hr>

<p>In <a href="https://github.com/openstreetmap/openstreetmap-website/pull/5998#discussion_r2089576340">app/assets/javascripts/heatmap.js</a>:</p>
<pre style='color:#555'>> -
-    cal.on("mouseover", (event, timestamp, value) => {
-      if (!displayName || !value) return;
-      if (event.target.parentElement.nodeName === "a") return;
+    }
+    if (weekColumn === 1) {
+      $day.addClass("d-none");
+      continue;
+    }
+    const count = $day.data("count") ?? 0;
+    const tooltipText = getTooltipText(date, count);
+    $day
+      .css("grid-area", getWeekdayRow(date.getUTCDay()) + " / " + weekColumn)
+      .attr("aria-label", tooltipText)
+      .tooltip({
+        title: tooltipText,
</pre>
<p dir="auto">Currently the tooltips are prone to line wrapping which doesn't look very good so I'd suggest adding a custom class here like:</p>
<div class="highlight highlight-source-js" dir="auto"><pre class="notranslate">customClass: <span class="pl-s">"heatmap-tooltip"</span></pre></div>
<p dir="auto">and then a CSS rule to allow wider tooltips:</p>
<div class="highlight highlight-source-css" dir="auto"><pre class="notranslate">.<span class="pl-c1">heatmap-tooltip</span> {
  <span class="pl-s1">--bs-tooltip-max-width</span><span class="pl-kos">:</span> <span class="pl-c1">300<span class="pl-smi">px</span></span>;
}</pre></div>

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