diff --git a/client/src/extension.ts b/client/src/extension.ts
index 5b1c374..75b7852 100644
--- a/client/src/extension.ts
+++ b/client/src/extension.ts
@@ -538,6 +538,11 @@ Executable ${this.denoInfo.executablePath}
         switch (extName) {
           case ".json":
             defaultTextContent = "{}";
+          case ".js":
+          case ".jsx":
+          case ".ts":
+          case ".tsx":
+            defaultTextContent = "export function example () {}";
             break;
         }