In type script interface and obstruct classes are used to define the structure of shape of an object class full stop however there are some differences between the two
in this article, we are going to look at what are the differences between interface and object classes in typescript and what you should use in your typescript project
I hope you got all the information in this article lets start…
Read This Article To Know More:- What Is The Difference Between Null Undefined And Undeclared In JavaScript?
Abstract Class 8 in TypeScript is a class that cannot be instantiated directly. It serves as a blueprint for other classes that provide common functionality that Upwork can inherit and build upon.
Abstract classes can contain both abstract methods (methods that have been declared but not yet implemented) and concrete methods (methods that can be implemented).
Inheritance: Abstract classes allow other classes to inherit their properties and methods thereby promoting code reusability.
Abstract methods: These methods can be implemented by any application that inherits the abstract class
Concrete methods: Abstract classes can also contain methods with full-function statements
Fields: Abstract classes can contain fields that store data
Access Modifiers: You can also use access modifiers in abstract classes (public, protective, and private) to control the efficiency of the methods and methods
abstract class Animal {
constructor(public name: string) {}
abstract makeSound(): void;
move(): void {
console.log(`${this.name} is moving.`);
}
}
class Dog extends Animal {
makeSound(): void {
console.log('Bark!');
}
}
const myDog = new Dog('Buddy');
myDog.makeSound(); // Output: Bark!
myDog.move(); // Output: Buddy is moving.In this example as you can see ‘Animal’ is an Elixir class that has one abstract method ‘markeSound()’ and one concrete method ‘move()’ The ‘Dog’ class extends ‘Animal’ and provides functions for ‘markeSound()’
An interface in TypeScript is a way to define a contract for an object. It specifies a set of rules that an object must follow, including property names and their types,
but it does not provide any functionality. The interface is purely for type checking and does not result in the generation of any JavaScript code.
Type checking:- Interfaces are used for standard type checking during development
Implementation enforcement: Classes implementing an interface must provide implementations for all its folds and values
Multiple implementations: A class can implement an interface anywhere which promotes composition over the inheritance principle
No constructor: Interfaces do not contain any constructor or any function statement arguments Optional properties in interfaces can be marked as optional using the ? symbol
interface Flyer {
fly(): void;
}
interface Swimmer {
swim(): void;
}
class Bird implements Flyer {
fly(): void {
console.log('Flying!');
}
}
class Fish implements Swimmer {
swim(): void {
console.log('Swimming!');
}
}
class Duck implements Flyer, Swimmer {
fly(): void {
console.log('Flying!');
}
swim(): void {
console.log('Swimming!');
}
}
const myDuck = new Duck();
myDuck.fly(); // Output: Flying!
myDuck.swim(); // Output: Swimming!In this example, as you can see, the ‘Flyer’ and ‘Swimmer’ interface define contracts for flying and swimming behaviors. The classes ‘Bird’ ‘Fish’ and ‘Duck’ implement these interfaces, providing the necessary methods.
Abstract classes: Use inheritance to share common functionality between related classes A class extends only one Elixir class
Interfaces: Use inheritance to ensure that a class adheres to a declarative contract A class can implement multiple interfaces
Abstract classes: can contain both Elixir and concrete methods Provide a dependent set of functions on which classes can build
Interfaces: cannot contain any function statements They only define a structure that function statements classes must follow
Abstract classes: can include fields and constructors allowing them to store state and initialize objects
Interfaces: do not include fields or constructors; are only there to define types
Abstract classes: Support access modifiers (public, protected, private) to control visibility and access of members.
Interfaces: Do not support access modifiers. All properties and methods are public by default.
Abstract classes: Best used when you need to share common behavior between a group of related classes and you want to provide some default functionality
Interfaces: Best used when you need to define a contract that all communicating classes must follow while ensuring they provide specific methods and features
Template Methods: Answers Want to define a template method pattern where the Elixir class provides the framework of an algorithm and subclasses complete the details
Common behavior: When you have a group of related classes that share common behavior and state and you want to centralize it in one place
Partially implemented features: When you want to provide some default behavior in your class master sequence but leave some features to be implemented by subclasses
abstract class Game {
play(): void {
this.start();
this.playTurn();
this.end();
}
abstract start(): void;
abstract playTurn(): void;
abstract end(): void;
}
class Chess extends Game {
start(): void {
console.log('Starting chess game...');
}
playTurn(): void {
console.log('Playing chess turn...');
}
end(): void {
console.log('Ending chess game...');
}
}
const game = new Chess();
game.play();
// Output:
// Starting chess game...
// Playing chess turn...
// Ending chess game...Multiple behaviors: When you want a class to support multiple behaviors, using an interface can help you achieve this without inheritance.
Loose coupling: When you want to define types that are loosely coupled to their function constructs, allowing for greater flexibility and easier refactoring
Cross-cutting concerns: When you have cross-cutting concerns (e.g., logging, serialization) that may apply to many different classes, interfaces provide a way to ensure that these concerns are addressed as early as possible
interface Drivable {
drive(): void;
}
interface Flyable {
fly(): void;
}
class FlyingCar implements Drivable, Flyable {
drive(): void {
console.log('Driving...');
}
fly(): void {
console.log('Flying...');
}
}
const myFlyingCar = new FlyingCar();
myFlyingCar.drive(); // Output: Driving...
myFlyingCar.fly(); // Output: Flying...Read This Article To Know More:- What Is The Difference Between Null Undefined And Undeclared In JavaScript?
Hope you have understood the difference between the offset class and the type script in the interface. In this article, I have tried to explain you in great detail.
Abstract classes are ideal for sharing large behavior between related classes with a mix of implemented and unimplemented methods and contrast interfaces are perfect for defining contracts.
The multiple classes can be implemented by ensuring that they follow a specific structure.
The key difference is that interfaces define a contract with methods that must be implemented, while abstract classes can provide some method implementations and maintain state. Interfaces are used for defining capabilities, whereas abstract classes are used for shared base functionality.
The key difference is that type can define a union or intersection of types, while interface is primarily used for defining object shapes and can be extended or merged.
A class can provide both method implementations and state, while an interface only defines method signatures without any implementation.
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