// @lib: es5 var id: number = 10000; var name: string = "my name"; var person: { name: string; id: number } = { name, id }; function foo( obj:{ name: string }): void { }; function bar(name: string, id: number) { return { name, id }; } function bar1(name: string, id: number) { return { name }; } function baz(name: string, id: number): { name: string; id: number } { return { name, id }; } foo(person); var person1 = bar("Hello", 5); var person2: { name: string } = bar("Hello", 5); var person3: { name: string; id:number } = bar("Hello", 5);