TypeScript abstract class

TypeScript Abstract Class:

Abstract class is a way of implementing 0 to 10

Syntax:

abstract class className {
   // declare fields
   // declare abstract/non-abstract methods
}

Abstract method:

A method with no implementation i.e. without braces and followed by a semicolon.

Syntax:

abstract return_type methodName();

Example:

abstract class Department {

    constructor(public name: string) {
    }

    printName(): void {
        console.log("Department name: " + this.name);
    }

    abstract printMeeting(): void; 
}

class AccountingDepartment extends Department {

    constructor() {
        super("Accounting and Auditing"); 
    }

    printMeeting(): void {
        console.log("The Accounting Department meets each Monday at 10am.");
    }

    generateReports(): void {
        console.log("Generating accounting reports...");
    }
}

let department: Department;
department = new AccountingDepartment();
department.printName();
department.printMeeting();