//// [classConstructorParametersAccessibility.ts] class C1 { constructor(public x: number) { } } var c1: C1; c1.x // OK class C2 { constructor(private p: number) { } } var c2: C2; c2.p // private, error class C3 { constructor(protected p: number) { } } var c3: C3; c3.p // protected, error class Derived extends C3 { constructor(p: number) { super(p); this.p; // OK } } //// [classConstructorParametersAccessibility.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 C1 = (function () { function C1(x) { this.x = x; } return C1; })(); var c1; c1.x; // OK var C2 = (function () { function C2(p) { this.p = p; } return C2; })(); var c2; c2.p; // private, error var C3 = (function () { function C3(p) { this.p = p; } return C3; })(); var c3; c3.p; // protected, error var Derived = (function (_super) { __extends(Derived, _super); function Derived(p) { _super.call(this, p); this.p; // OK } return Derived; })(C3);