1 files changed, 3 insertions, 1 deletions
diff --git a/js/main.ts b/js/main.ts
index 87fe30e6c..d652b18bc 100644
--- a/js/main.ts
+++ b/js/main.ts
@@ -72,5 +72,7 @@ export default function denoMain() {
 
   const inputFn = argv[1];
   const mod = runtime.resolveModule(inputFn, `${cwd}/`);
-  mod.compileAndRun();
+  assert(mod != null);
+  // TypeScript does not track assert, therefore not null assertion
+  mod!.compileAndRun();
 }