The Usage of Getters and Setters. The so-called getter and setter methods represent accessor properties. They are specified by get and set inside an object literal as shown below: let obj = { get propName () { // getter, the code executed when obj.propName id getting }, set propName (value) { // setter, the code executed when obj.propName .... Jun 17, 2015 ยท The TypeScript data type inference also works with parameter types. For example, the addEventListener method accepts two parameters. The second is a function in which addEventListener passes an object of type PointerEvent. TypeScript knows that and supports accessing the cancelBubble property of the PointerEvent class within the function:. "/>Typescript getter vs function