//// [thisInSuperCall1.ts] class Base { constructor(a: any) {} } class Foo extends Base { constructor(public x: number) { super(this); } } //// [thisInSuperCall1.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(a) { } return Base; })(); var Foo = (function (_super) { __extends(Foo, _super); function Foo(x) { _super.call(this, this); this.x = x; } return Foo; })(Base);