//// [classConstructorParametersAccessibility3.ts] class Base { constructor(protected p: number) { } } class Derived extends Base { constructor(public p: number) { super(p); this.p; // OK } } var d: Derived; d.p; // public, OK //// [classConstructorParametersAccessibility3.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(p) { this.p = p; } return Base; })(); var Derived = (function (_super) { __extends(Derived, _super); function Derived(p) { _super.call(this, p); this.p = p; this.p; // OK } return Derived; })(Base); var d; d.p; // public, OK