//// [emitArrowFunctionThisCapturing.ts] var f1 = () => { this.age = 10 }; var f2 = (x: string) => { this.name = x } function foo(func: () => boolean) { } foo(() => { this.age = 100; return true; }); //// [emitArrowFunctionThisCapturing.js] var _this = this; var f1 = function () { _this.age = 10; }; var f2 = function (x) { _this.name = x; }; function foo(func) { } foo(function () { _this.age = 100; return true; });