UI5 Classes and Objects

Basic Classes & Objects

In order to create a class you have to .extend the component/class "sap.ui.base.Object". The extended class has a constructor comparable to other languages like ABAP or JAVA for example.

The constructor will be called when you create an object of your class.

//create a new object of class myClass
const oNewObject = new myClass(someParameters);

Where does the sap.ui.base.Object even come from? Here is an overview of the class hierarchy in UI5:

The .this keyword in JS

The this-keyword within the class or the class constructor refers to the object itself. Somewhat like me-> does in ABAP. But be careful, the this-keyword means more than that in JS.

A short but helpful explanation of what the this-keyword is (or can be):

• "The object that is executing the current function"

Private methods in UI5

In JS it isn't really possible to declare functions or attributes as private. To do so you adhere to common development 'standards/best practices'. By prefixing the function or attribute with an underscore you declare it as private. There is no difference to this when developing in UI5.

//declare a private method in my class
_someMethod : function(){
    //some code
}