//// [nonGenericClassExtendingGenericClassWithAny.ts] class Foo { t: T; } class Bar extends Foo { } // Valid //// [nonGenericClassExtendingGenericClassWithAny.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; } d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __()); }; var Foo = (function () { function Foo() { } return Foo; })(); var Bar = (function (_super) { __extends(Bar, _super); function Bar() { _super.apply(this, arguments); } return Bar; })(Foo); // Valid