Extending one class from another.

TypeScript Classes - Learn TYPESCRIPT | Revochamp

Name: TypeScript Classes
Availability: InStock
Author: Revochamp

What is a Class?

A class in TypeScript is a blueprint for creating objects, supporting object-oriented programming features like encapsulation and inheritance.

Basic Class Example

TypeScriptRead-only

class User {
  name: string;

  constructor(name: string) {
    this.name = name;
  }
}

const u = new User('John');

class User {
  name: string;

  constructor(name: string) {
    this.name = name;
  }
}

const u = new User('John');

Access Modifiers

TypeScriptRead-only

class Person {
  public name: string;
  private age: number;
  protected id: number;
}

class Person {
  public name: string;
  private age: number;
  protected id: number;
}

Readonly Properties

TypeScriptRead-only

class User {
  readonly id: number;

  constructor(id: number) {
    this.id = id;
  }
}

class User {
  readonly id: number;

  constructor(id: number) {
    this.id = id;
  }
}

Methods

TypeScriptRead-only

class User {
  greet(): string {
    return 'Hello';
  }
}

class User {
  greet(): string {
    return 'Hello';
  }
}

Inheritance

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');
  }
}

Constructor Short Syntax

TypeScriptRead-only

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

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

Best Practices

Use access modifiers properly
Keep classes focused and simple
Use inheritance wisely
Encapsulate logic inside classes

Common Mistakes

Overusing inheritance
Not using access modifiers
Large and complex classes
Ignoring encapsulation

Conclusion

TypeScript classes enable object-oriented programming, helping build scalable and maintainable applications.

What is a Class?

A class in TypeScript is a blueprint for creating objects, supporting object-oriented programming features like encapsulation and inheritance.

Basic Class Example

TypeScriptRead-only

class User {
  name: string;

  constructor(name: string) {
    this.name = name;
  }
}

const u = new User('John');

class User {
  name: string;

  constructor(name: string) {
    this.name = name;
  }
}

const u = new User('John');

Access Modifiers

TypeScriptRead-only

class Person {
  public name: string;
  private age: number;
  protected id: number;
}

class Person {
  public name: string;
  private age: number;
  protected id: number;
}

Readonly Properties

TypeScriptRead-only

class User {
  readonly id: number;

  constructor(id: number) {
    this.id = id;
  }
}

class User {
  readonly id: number;

  constructor(id: number) {
    this.id = id;
  }
}

Methods

TypeScriptRead-only

class User {
  greet(): string {
    return 'Hello';
  }
}

class User {
  greet(): string {
    return 'Hello';
  }
}

Inheritance

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');
  }
}

Constructor Short Syntax

TypeScriptRead-only

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

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

Best Practices

Use access modifiers properly
Keep classes focused and simple
Use inheritance wisely
Encapsulate logic inside classes

Common Mistakes

Overusing inheritance
Not using access modifiers
Large and complex classes
Ignoring encapsulation

Conclusion

TypeScript classes enable object-oriented programming, helping build scalable and maintainable applications.

TypeScript Classes

TypeScript Classes

What is a Class?

Basic Class Example

Access Modifiers

Readonly Properties

Methods

Inheritance

Constructor Short Syntax

Best Practices

Common Mistakes

Conclusion

Try it yourself

Test Your Knowledge

Frequently Asked Questions

Need help?

TypeScript Classes

TypeScript Classes

What is a Class?

Basic Class Example

Access Modifiers

Readonly Properties

Methods

Inheritance

Constructor Short Syntax

Best Practices

Common Mistakes

Conclusion

Try it yourself

Test Your Knowledge

Frequently Asked Questions

Need help?