//// [privateStaticMemberAccessibility.ts] class Base { private static foo: string; } class Derived extends Base { static bar = Base.foo; // error bing = () => Base.foo; // error } //// [privateStaticMemberAccessibility.js] var __extends = (this && this.__extends) || function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; function __() { this.constructor = d; } __.prototype = b.prototype; d.prototype = new __(); }; var Base = (function () { function Base() { } return Base; })(); var Derived = (function (_super) { __extends(Derived, _super); function Derived() { _super.apply(this, arguments); this.bing = function () { return Base.foo; }; // error } Derived.bar = Base.foo; // error return Derived; })(Base);