Uncaught TypeError: Cannot assign to read only property

Question

I was trying out this really simple example from the awesome \"Professional JavaScript for Web Developers\" book by Nicholas Zakas but I can\'t figure what I am doing wrong

Answer 1

I tried changing year to a different term, and it worked.

public_methods : {
    get: function() {
        return this._year;
    },

    set: function(newValue) {
        if(newValue > this.originYear) {
            this._year = newValue;
            this.edition += newValue - this.originYear;
        }
    }
}