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Now that's it for classes.

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We learned about classes themselves.

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We learned about their properties the Axis modifiers private for internal axis protected for internal

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axis.

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Also inheriting classes and public for axis from everywhere.

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We also learned about methods which we can add about static methods and properties about abstract methods

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and abstract classes which is important when we talk about another important concept.

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The inheritance which we can use here we're inheriting from the apartment with the X tense keyword.

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This allows us to share functionalities properties and methods from the Department class with this inheritance

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class and add our own functionalities or override existing functionalities ever because we have to overwrite

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as in the case of describe which is an abstract method or because we want to override like in the case

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of an employee here in the accounting department.

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That's not an abstract method.

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In the base class.

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But of course we still can override it if we want to.

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We also learned about the Singleton pattern and private constructors which can also be useful sometimes.

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And therefore overall you now hopefully have a good idea of classes and what you can do with them and

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typescript in general of course you need to know what classes and objects and all to bid what prototypes

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are about in vanilla javascript because that's generally not something introduced by a typescript but

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of course something typescript is related to because typescript builds up on these default javascript

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features and adds its own magic on top of these features.