install gulp

user/themes/anissabensalah/node_modules/es5-ext/math/clz32/implement.js

@@ -0,0 +1,8 @@
+"use strict";
+
+if (!require("./is-implemented")()) {
+	Object.defineProperty(Math, "clz32", { value: require("./shim"),
+		configurable: true,
+enumerable: false,
+writable: true });
+}

user/themes/anissabensalah/node_modules/es5-ext/math/clz32/index.js

@@ -0,0 +1,5 @@
+"use strict";
+
+module.exports = require("./is-implemented")()
+	? Math.clz32
+	: require("./shim");

user/themes/anissabensalah/node_modules/es5-ext/math/clz32/is-implemented.js

@@ -0,0 +1,7 @@
+"use strict";
+
+module.exports = function () {
+	var clz32 = Math.clz32;
+	if (typeof clz32 !== "function") return false;
+	return clz32(1000) === 22;
+};

user/themes/anissabensalah/node_modules/es5-ext/math/clz32/shim.js

@@ -0,0 +1,7 @@
+"use strict";
+
+module.exports = function (value) {
+	// eslint-disable-next-line no-bitwise
+	value >>>= 0;
+	return value ? 32 - value.toString(2).length : 32;
+};