Configring node js.

node_modules/jszip/lib/external.js

@@ -0,0 +1,19 @@
+/* global Promise */
+'use strict';
+
+// load the global object first:
+// - it should be better integrated in the system (unhandledRejection in node)
+// - the environment may have a custom Promise implementation (see zone.js)
+var ES6Promise = null;
+if (typeof Promise !== "undefined") {
+    ES6Promise = Promise;
+} else {
+    ES6Promise = require("lie");
+}
+
+/**
+ * Let the user use/change some implementations.
+ */
+module.exports = {
+    Promise: ES6Promise
+};