fix: fix constructor

Author: zdm

lib/_browser/index.js

@@ -30,16 +30,21 @@ class Result {
             // object
             else if ( typeof status === "object" ) {
 
+                // Result
+                if ( status instanceof Result ) {
+                    status = status.status;
+                    statusText = status.statusText;
+                }
+
                 // Error
-                if ( status instanceof Error ) {
+                else if ( status instanceof Error ) {
                     status = 500;
                     statusText = status.message;
                 }
 
-                // other object
+                // invalid status
                 else {
-                    status = status.status;
-                    statusText = status.statusText;
+                    throw new TypeError( "Result status is not valid" );
                 }
             }
         }