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JavaScript Object-Oriented JavaScript Getters and Setters Creating Setter Methods

Alexander Rizov
Alexander Rizov
4,910 Points
Posted by Alexander Rizov
Alexander Rizov
4,910 Points

Using the 'this' keyword instead of Class-/Object-name when calling a value in a setter.

As the title says, I'm having a bit of trouble understanding why the code works, when you use dot.notation with the 'this' keyword in a setter, but using the Object's name the same way it doesn't. Example:

Works: set major(major) { if (this.level != 'Senior' || this.level != 'Junior') { this._major = 'None'; } else { this._major = major; } }

Doesn't work: set major(major) { if (Student.level != 'Senior' || Student.level != 'Junior') { this._major = 'None'; } else { this._major = major; } }

Is it because setter and getter methods are not strictly speaking attached to the object, or am I missing something else?

creating_setters.js 
class Student {
    constructor(gpa, credits){
        this.gpa = gpa;
        this.credits = credits;
    }

    stringGPA() {
        return this.gpa.toString();
    }

    get level() {
        if (this.credits > 90 ) {
            return 'Senior';
        } else if (this.credits > 60) {
            return 'Junior';
        } else if (this.credits > 30) {
            return 'Sophomore';
        } else {
            return 'Freshman';
        }
    }

  set major(major) {
    if (this.level != 'Senior' || this.level != 'Junior') {
      this._major = 'None';
    } else {
      this._major = major;
    }
  }



}

var student = new Student(3.9, 60);