private.js

private.js

class Alpha {
    constructor() {
        this.a = "red";
        this.#b = "green";
    }
  
    identify() {
        console.log(this.a, this.#b);    
    }
}

class Bravo extends Alpha {
    constructor() {
        super();
        this.a = "Ryu";
        this.#b = "Dhalsim";
    }
}
    
new Alpha().identify(); 
    // red, green

new Bravo().identify(); 
    // Ryu, green