//// [recursiveInheritance3.ts] class C implements I { public foo(x: any) { return x; } private x = 1; } interface I extends C { other(x: any): any; } //// [recursiveInheritance3.js] var C = (function () { function C() { this.x = 1; } C.prototype.foo = function (x) { return x; }; return C; })();