Question

How to use protected member in class in TypeScript

Answer 1

class Employee {
    eName: string|undefined; // public
    protected eID: number;

    constructor(name: string, ID: number){
            this.eName = name;
            this.eID = ID;
        }
}

class Programmers extends Employee{
    private pLanguage: string;
    
    constructor(name: string, ID: number, language: string) {
        super(name, ID);
        this.pLanguage = language;
    }

    display = () => console.log(this.eID + ' ' + this.eName + ' ' + this.pLanguage)
}

let emp = new Programmers("HAL 9000", 8474672, "TypeScript");

emp.display();

// emp.eID; // Property 'eID' is protected and only accessible within class 'Employee' and its subclasses.(2445)

  
      
/*
      
run:
      
"8474672 HAL 9000 TypeScript" 
     
*/

 

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