diff --git a/flake.nix b/flake.nix
index d801027..5a4daa6 100644
--- a/flake.nix
+++ b/flake.nix
@@ -16,6 +16,8 @@
       in {
         devShell = pkgs.mkShell {
           nativeBuildInputs = with pkgs; [
+            nodePackages.typescript-language-server
+
             (python39.withPackages (pypkgs:
               with pypkgs; [
                 beautifulsoup4
diff --git a/guangdong/extract-urls.js b/guangdong/extract-urls.js
index 7081ecb..94e2824 100644
--- a/guangdong/extract-urls.js
+++ b/guangdong/extract-urls.js
@@ -15,17 +15,17 @@
  * @param {string} fileName - The filename to give the file
  */
 function downloadString(text, fileType, fileName) {
-  var blob = new Blob([text], { type: fileType });
+    var blob = new Blob([text], { type: fileType });
 
-  var a = document.createElement('a');
-  a.download = fileName;
-  a.href = URL.createObjectURL(blob);
-  a.dataset.downloadurl = [fileType, a.download, a.href].join(':');
-  a.style.display = "none";
-  document.body.appendChild(a);
-  a.click();
-  document.body.removeChild(a);
-  setTimeout(function() { URL.revokeObjectURL(a.href); }, 1500);
+    var a = document.createElement('a');
+    a.download = fileName;
+    a.href = URL.createObjectURL(blob);
+    a.dataset.downloadurl = [fileType, a.download, a.href].join(':');
+    a.style.display = "none";
+    document.body.appendChild(a);
+    a.click();
+    document.body.removeChild(a);
+    setTimeout(function() { URL.revokeObjectURL(a.href); }, 1500);
 }
 
 /**