//// [constructorFunctionTypeIsAssignableToBaseType.ts] class Base { static foo: { bar: Object; } } class Derived extends Base { // ok static foo: { bar: number; } } class Derived2 extends Base { // ok, use assignability here static foo: { bar: any; } } //// [constructorFunctionTypeIsAssignableToBaseType.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() { } return Base; })(); var Derived = (function (_super) { __extends(Derived, _super); function Derived() { _super.apply(this, arguments); } return Derived; })(Base); var Derived2 = (function (_super) { __extends(Derived2, _super); function Derived2() { _super.apply(this, arguments); } return Derived2; })(Base);