classes in typescript
class Info {
private name: string ;
constructor(n:string){
this.name = n ;
};
describe(){
console.log(`Your name is ${this.name}`);
}
}
const a = new Info('joyous');
a.describe();classes in typescript
class Info {
private name: string ;
constructor(n:string){
this.name = n ;
};
describe(){
console.log(`Your name is ${this.name}`);
}
}
const a = new Info('joyous');
a.describe();abstract classes in typescript
abstract class Department {
constructor(public name: string) {}
printName(): void {
console.log("Department name: " + this.name);
}
abstract printMeeting(): void; // must be implemented in derived classes
}
class AccountingDepartment extends Department {
constructor() {
super("Accounting and Auditing"); // constructors in derived classes must call super()
}
printMeeting(): void {
console.log("The Accounting Department meets each Monday at 10am.");
}
generateReports(): void {
console.log("Generating accounting reports...");
}
}
let department: Department; // ok to create a reference to an abstract type
department = new Department(); // error: cannot create an instance of an abstract class
Cannot create an instance of an abstract class.2511Cannot create an instance of an abstract class.department = new AccountingDepartment(); // ok to create and assign a non-abstract subclass
department.printName();
department.printMeeting();
department.generateReports();
Property 'generateReports' does not exist on type 'Department'.2339Property 'generateReports' does not exist on type 'Department'.Trytypescript class type t
class GenericNumber<T> {
zeroValue: T;
add: (x: T, y: T) => T;
}
let myGenericNumber = new GenericNumber<number>();
myGenericNumber.zeroValue = 0;
myGenericNumber.add = function(x, y) { return x + y; };how to extend ts class
class Animal {
move(distanceInMeters: number = 0) {
console.log(`Animal moved ${distanceInMeters}m.`);
}
}
class Dog extends Animal {
bark() {
console.log("Woof! Woof!");
}
}
const dog = new Dog();
dog.bark();
dog.move(10);
dog.bark();TryTypeScript Class Example
class Animal { public name: string;
public constructor(theName: string) { this.name = theName; }
public move(distanceInMeters: number) { console.log(`${this.name} moved ${distanceInMeters}m.`); }}Tryts create nex field
var obj:any = {}
obj.prop = 5;Copyright © 2021 Codeinu
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