Quiz App in JavaScript

1class Quiz {
2    constructor(questions) { this.questions = questions; this.score = 0; this.current = 0; }
3    answer(answer) { if(answer === this.questions[this.current].correct) this.score++; this.current++; }
4    isComplete() { return this.current >= this.questions.length; }
5    getScore() { return this.score; }
6}