Update code for version switcher to match pyremap

conda_package/docs/shared/version-switcher.js

@@ -1,42 +1,49 @@
 (async function () {
-    const container = document.getElementById("version-switcher");
-    if (!container) return;
-
-    const metaVersion = document.querySelector('meta[name="doc-version"]');
-    const currentVersion = metaVersion ? metaVersion.content : "unknown";
-    console.log("Stored current version:", currentVersion);
-
-    async function fetchVersions() {
-      try {
-        const res = await fetch("/shared/versions.json");
-        if (!res.ok) throw new Error();
-        return await res.json();
-      } catch {
-        const res = await fetch("../shared/versions.json");
-        return await res.json();
-      }
+  const container = document.getElementById("version-switcher");
+  if (!container) return;
+
+  const metaVersion = document.querySelector('meta[name="doc-version"]');
+  const currentVersion = metaVersion ? metaVersion.content : "unknown";
+  console.log("Detected current version:", currentVersion);
+
+  async function fetchVersions() {
+    try {
+      const scriptUrl = document.currentScript.src;
+      const basePath = scriptUrl.substring(0, scriptUrl.lastIndexOf('/') + 1);
+      const versionsUrl = basePath + "versions.json";
+
+      const res = await fetch(versionsUrl);
+      if (!res.ok) throw new Error(`Failed to load ${versionsUrl}`);
+      return await res.json();
+    } catch (err) {
+      console.error("Could not load versions.json:", err);
+      return [];
+    }
+  }
+
+  const versions = await fetchVersions();
+  if (!versions.length) return;
+
+  const select = document.createElement("select");
+  select.style.marginLeft = "1em";
+  select.onchange = () => {
+    window.location.href = select.value;
+  };
+
+  versions.forEach(({ version, url }) => {
+    const option = document.createElement("option");
+    option.value = url;
+    option.textContent = version;
+    if (version === currentVersion) {
+      option.selected = true;
     }
+    select.appendChild(option);
+  });
+
+  const label = document.createElement("label");
+  label.textContent = "Version: ";
+  label.style.color = "white";
+  label.appendChild(select);
+  container.appendChild(label);
+})();
 
-    const versions = await fetchVersions();
-
-    const select = document.createElement("select");
-    select.style.marginLeft = "1em";
-    select.onchange = () => {
-      window.location.href = select.value;
-    };
-
-    versions.forEach(({ version, url }) => {
-      const option = document.createElement("option");
-      option.value = url;
-      option.textContent = version;
-      if (url.includes(`/${currentVersion}/`)) {
-        option.selected = true;
-      }
-      select.appendChild(option);
-    });
-
-    const label = document.createElement("label");
-    label.textContent = "Version: ";
-    label.appendChild(select);
-    container.appendChild(label);
-  })();