Add file download functionality

1 files changed, 4 insertions, 0 deletions

diff --git a/js.go b/js.go
index a132c1c..719c031 100644
--- a/js.go
+++ b/js.go
@@ -126,6 +126,10 @@ func vm(src string, imports Imports) (Exports, error) {
 	}
 
 	exports := Exports{}
+	if goja.IsUndefined(v) {
+		return exports, nil
+	}
+
 	obj := v.ToObject(vm)
 	for _, key := range obj.Keys() {
 		exports[key] = obj.Get(key).Export()