Difference between 'extends' and 'implements' in TypeScript

Today, a friend ask about the difference between extends and implements.

class Media {
  format: string;
}
class Video extends Media {}
class Image implements Media {}

The short answer for him was:

extends: The class get all these methods and properties from the parent, so you don't have to implement.

implements: The class has to implement methods and properties.

I hope this is can help someone with the same question.

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