Update static/script.js

static/script.js

@@ -31,6 +31,9 @@ document.addEventListener("DOMContentLoaded", () => {
   const panelSeq = document.getElementById("panel-seq");
   const panelFasta = document.getElementById("panel-fasta");
   const downloadBtn = document.getElementById("downloadCsvBtn");
+  if (downloadBtn) {
+    downloadBtn.addEventListener("click", downloadCSV);
+  }
 
   if (tabSeq && tabFasta && panelSeq && panelFasta) {
     tabSeq.addEventListener("click", () => {
@@ -46,10 +49,6 @@ document.addEventListener("DOMContentLoaded", () => {
       panelFasta.classList.remove("hidden");
       panelSeq.classList.add("hidden");
     });
-    
-    (downloadBtn) {
-      downloadBtn.addEventListener("click", downloadCSV);
-    });
   }
 
   // Buttons
@@ -423,4 +422,4 @@ function downloadCSV() {
     .catch(err => {
       alert("Download error: " + err.message);
     });
-}
+}