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Method Overriding - In Method Overriding, redefined the base class methods in the derive class or child class. Example as, class NewPrinter extends Printer { doPrint() : any { super .doPrint(); console.log( "Called Child class." ); } doInkJetPrint() : any { console.log( "Called doInkJetPrint()." ); } } let printer: new () => NewPrinter; printer.doPrint(); printer.doInkJetPrint(); Stayed Informed – Learn Angular 2 with TypeScript I hope you are enjoying with this post! Please share with you friends. Thank you!!