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

<hr>

<p>In <a href="https://github.com/openstreetmap/openstreetmap-website/pull/6255#discussion_r2233887018">app/assets/javascripts/download_util.js</a>:</p>
<pre style='color:#555'>> +      try {
+        detailMessage = event?.detail?.error?.message;
+        if (!detailMessage) {
+          const responseText = await event.detail.fetchResponse.responseText;
+          const parser = new DOMParser();
+          const doc = parser.parseFromString(responseText, "text/html");
+          detailMessage = doc.body ? doc.body.textContent.trim() : "(unknown)";
+        }
+      } catch (err) {
+        detailMessage = "(unknown)";
+      }
+      // eslint-disable-next-line no-alert
+      alert(OSM.i18n.t("javascripts.share.export_failed", { reason: detailMessage }));
+    }
+
+    static getTurboBlobHandler(downloadCallback) {
</pre>
<p dir="auto">Indeed, and once all that is done <code class="notranslate">downloadBlob</code> doesn't really need to be exported in <code class="notranslate">OSM</code> and could just be a function in the <code class="notranslate">DownloadUtil</code> class?</p>

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