TYPESCRIPT

typescript class inheritance

class Person {
    constructor(private firstName: string, private lastName: string) {
        this.firstName = firstName;
        this.lastName = lastName;
    }
    getFullName(): string {
        return `${this.firstName} ${this.lastName}`;
    }
    describe(): string {
        return `This is ${this.firstName} ${this.lastName}.`;
    }
}
Code language: TypeScript (typescript)

TypeScript Class Inheritance

class Animal {  name: string;  constructor(theName: string) {    this.name = theName;  }  move(distanceInMeters: number = 0) {    console.log(`${this.name} moved ${distanceInMeters}m.`);  }}
class Snake extends Animal {  constructor(name: string) {    super(name);  }  move(distanceInMeters = 5) {    console.log("Slithering...");    super.move(distanceInMeters);  }}
class Horse extends Animal {  constructor(name: string) {    super(name);  }  move(distanceInMeters = 45) {    console.log("Galloping...");    super.move(distanceInMeters);  }}
let sam = new Snake("Sammy the Python");let tom: Animal = new Horse("Tommy the Palomino");
sam.move();tom.move(34);Try

typescript class inheritance

class Employee extends Person {
    constructor(
        firstName: string,
        lastName: string,
        private jobTitle: string) {
        
        // call the constructor of the Person class:
        super(firstName, lastName);
    }
}
Code language: TypeScript (typescript)

typescript class inheritance

class Employee extends Person {
    //..
}
Code language: TypeScript (typescript)

TypeScript Class Inheritance Example

class Animal {  private name: string;  constructor(theName: string) {    this.name = theName;  }}
class Rhino extends Animal {  constructor() {    super("Rhino");  }}
class Employee {  private name: string;  constructor(theName: string) {    this.name = theName;  }}
let animal = new Animal("Goat");let rhino = new Rhino();let employee = new Employee("Bob");
animal = rhino;animal = employee;Type 'Employee' is not assignable to type 'Animal'.
  Types have separate declarations of a private property 'name'.2322Type 'Employee' is not assignable to type 'Animal'.
  Types have separate declarations of a private property 'name'.Try