Why doesn't StaffMember.discountPercent work?



Since, StaffMember contains the property discountPercent, I was hoping it to work.

Kindly, help me here with this.

function StaffMember(name,discountPercent){
    this.name = name;
    this.discountPercent = discountPercent;

var sally = new StaffMember("Sally",5);
var bob = new StaffMember("Bob",10);

// Create yourself again as 'me' with a staff discount of 20%
var me = new StaffMember("Ayush",20);

var cashRegister = {
    lastTransactionAmount: 0,
    add: function(itemCost){
        this.total += (itemCost || 0);
        this.lastTransactionAmount = itemCost;
    scan: function(item,quantity){
        switch (item){
        case "eggs": this.add(0.98 * quantity); break;
        case "milk": this.add(1.23 * quantity); break;
        case "magazine": this.add(4.99 * quantity); break;
        case "chocolate": this.add(0.45 * quantity); break;
        return true;
    voidLastTransaction : function(){
        this.total -= this.lastTransactionAmount;
        this.lastTransactionAmount = 0;
    // Create a new method applyStaffDiscount here
    applyStaffDiscount: function(employee) {
       this.total -= this.total*(StaffMember.discountPercent/100);

// Apply your staff discount by passing the 'me' object 
// to applyStaffDiscount


// Show the total bill
console.log('Your bill is '+ cashRegister.total.toFixed(2));


What makes you say it has that property? It's a function, no, it doesn't.


If I assigned the value of StaffMember to a variable say, staff, then would the staff.discountPercent worK?


Nope. Because the value of StaffMember is a function. Assigning that to another variable doesn't change its value, it just makes it so that two variables refer to it.

function f() {}
console.log(f);  // [Function: f]
var g = f;
console.log(g);  // [Function: f]


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