//// [extendBaseClassBeforeItsDeclared.ts] class derived extends base { } class base { constructor (public n: number) { } } //// [extendBaseClassBeforeItsDeclared.js] var __extends = 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 derived = (function (_super) { __extends(derived, _super); function derived() { _super.apply(this, arguments); } return derived; })(base); var base = (function () { function base(n) { this.n = n; } return base; })();