add login/sign-up page with dark/light mode

node_modules/es-abstract/2019/FromPropertyDescriptor.js

@@ -0,0 +1,16 @@
+'use strict';
+
+var $TypeError = require('es-errors/type');
+
+var isPropertyDescriptor = require('../helpers/records/property-descriptor');
+var fromPropertyDescriptor = require('../helpers/fromPropertyDescriptor');
+
+// https://262.ecma-international.org/6.0/#sec-frompropertydescriptor
+
+module.exports = function FromPropertyDescriptor(Desc) {
+	if (typeof Desc !== 'undefined' && !isPropertyDescriptor(Desc)) {
+		throw new $TypeError('Assertion failed: `Desc` must be a Property Descriptor');
+	}
+
+	return fromPropertyDescriptor(Desc);
+};