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

node_modules/es-abstract/2021/OrdinaryHasInstance.js

@@ -0,0 +1,23 @@
+'use strict';
+
+var $TypeError = require('es-errors/type');
+var isObject = require('es-object-atoms/isObject');
+
+var Get = require('./Get');
+var IsCallable = require('./IsCallable');
+
+// https://262.ecma-international.org/6.0/#sec-ordinaryhasinstance
+
+module.exports = function OrdinaryHasInstance(C, O) {
+	if (!IsCallable(C)) {
+		return false;
+	}
+	if (!isObject(O)) {
+		return false;
+	}
+	var P = Get(C, 'prototype');
+	if (!isObject(P)) {
+		throw new $TypeError('OrdinaryHasInstance called on an object with an invalid prototype property.');
+	}
+	return O instanceof C;
+};