From: Ondřej Španěl <OndrejSpanel@users.noreply.github.com>
Date: Fri, 24 Feb 2017 00:51:24 +0000 (+0100)
Subject: Avoid using exports when undefined (#1471)
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=852f78491a212ba20841847436dab93abb0a8181;p=UglifyJS.git

Avoid using exports when undefined (#1471)

Makes direct usage within web browser easier, even if officially unsupported.
---

diff --git a/lib/ast.js b/lib/ast.js
index 42506cb2..61643aed 100644
--- a/lib/ast.js
+++ b/lib/ast.js
@@ -81,7 +81,9 @@ function DEFNODE(type, props, methods, base) {
     ctor.DEFMETHOD = function(name, method) {
         this.prototype[name] = method;
     };
-    exports["AST_" + type] = ctor;
+    if (typeof exports !== "undefined") {
+        exports["AST_" + type] = ctor;
+    }
     return ctor;
 };