Reusing properties from another class.

TypeScript Inheritance - Learn TYPESCRIPT | Revochamp

Name: TypeScript Inheritance
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Author: Revochamp

What is Inheritance?

Inheritance allows a class to reuse properties and methods from another class using the extends keyword.

Basic Example

TypeScriptRead-only

class Animal {
  move() {
    console.log('Moving');
  }
}

class Dog extends Animal {
  bark() {
    console.log('Bark');
  }
}

class Animal {
  move() {
    console.log('Moving');
  }
}

class Dog extends Animal {
  bark() {
    console.log('Bark');
  }
}

Using super()

TypeScriptRead-only

class Animal {
  constructor(public name: string) {}
}

class Dog extends Animal {
  constructor(name: string) {
    super(name);
  }
}

class Animal {
  constructor(public name: string) {}
}

class Dog extends Animal {
  constructor(name: string) {
    super(name);
  }
}

Method Overriding

TypeScriptRead-only

class Animal {
  speak() {
    console.log('Animal sound');
  }
}

class Dog extends Animal {
  speak() {
    console.log('Bark');
  }
}

class Animal {
  speak() {
    console.log('Animal sound');
  }
}

class Dog extends Animal {
  speak() {
    console.log('Bark');
  }
}

Access Modifiers in Inheritance

Protected members can be accessed in subclasses, while private members cannot.

Inheritance Benefits

Code reusability
Cleaner structure
Easy maintenance
Supports OOP principles

Best Practices

Use inheritance for shared logic
Avoid deep inheritance chains
Override methods carefully
Use protected for shared properties

Common Mistakes

Overusing inheritance
Not calling super() in constructor
Breaking encapsulation
Confusing inheritance with composition

Conclusion

Inheritance helps build scalable and maintainable applications by enabling code reuse and hierarchical relationships.

What is Inheritance?

Inheritance allows a class to reuse properties and methods from another class using the extends keyword.

Basic Example

TypeScriptRead-only

class Animal {
  move() {
    console.log('Moving');
  }
}

class Dog extends Animal {
  bark() {
    console.log('Bark');
  }
}

class Animal {
  move() {
    console.log('Moving');
  }
}

class Dog extends Animal {
  bark() {
    console.log('Bark');
  }
}

Using super()

TypeScriptRead-only

class Animal {
  constructor(public name: string) {}
}

class Dog extends Animal {
  constructor(name: string) {
    super(name);
  }
}

class Animal {
  constructor(public name: string) {}
}

class Dog extends Animal {
  constructor(name: string) {
    super(name);
  }
}

Method Overriding

TypeScriptRead-only

class Animal {
  speak() {
    console.log('Animal sound');
  }
}

class Dog extends Animal {
  speak() {
    console.log('Bark');
  }
}

class Animal {
  speak() {
    console.log('Animal sound');
  }
}

class Dog extends Animal {
  speak() {
    console.log('Bark');
  }
}

Access Modifiers in Inheritance

Protected members can be accessed in subclasses, while private members cannot.

Inheritance Benefits

Code reusability
Cleaner structure
Easy maintenance
Supports OOP principles

Best Practices

Use inheritance for shared logic
Avoid deep inheritance chains
Override methods carefully
Use protected for shared properties

Common Mistakes

Overusing inheritance
Not calling super() in constructor
Breaking encapsulation
Confusing inheritance with composition

Conclusion

Inheritance helps build scalable and maintainable applications by enabling code reuse and hierarchical relationships.

TypeScript Inheritance

TypeScript Inheritance

What is Inheritance?

Basic Example

Using super()

Method Overriding

Access Modifiers in Inheritance

Inheritance Benefits

Best Practices

Common Mistakes

Conclusion

Try it yourself

Test Your Knowledge

Frequently Asked Questions

Need help?

TypeScript Inheritance

TypeScript Inheritance

What is Inheritance?

Basic Example

Using super()

Method Overriding

Access Modifiers in Inheritance

Inheritance Benefits

Best Practices

Common Mistakes

Conclusion

Try it yourself

Test Your Knowledge

Frequently Asked Questions

Need help?