install gulp

user/themes/anissabensalah/node_modules/es5-ext/promise/#/as-callback.js

@@ -0,0 +1,19 @@
+"use strict";
+
+var ensurePlainFunction = require("../../object/ensure-plain-function")
+  , ensureThenable      = require("../../object/ensure-thenable")
+  , microtaskDelay      = require("../../function/#/microtask-delay");
+
+module.exports = function (callback) {
+	ensureThenable(this);
+	ensurePlainFunction(callback);
+	// Rely on microtaskDelay to escape eventual error swallowing
+	this.then(
+		microtaskDelay.call(function (value) {
+			callback(null, value);
+		}),
+		microtaskDelay.call(function (reason) {
+			callback(reason);
+		})
+	);
+};

user/themes/anissabensalah/node_modules/es5-ext/promise/#/index.js

@@ -0,0 +1,5 @@
+"use strict";
+
+module.exports = {
+	asCallback: require("./as-callback")
+};