关于javascript：意外的令牌？

javascriptsyntax-error

Unexpected token?

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所以我得到syntaxerror:unexpected token on line"question.prototype.displayQuestion()"。但代码看起来不错。有人知道发生了什么事吗？

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function Question(question, answers, correct){
this.question = question;
this.answers = answers;
this.correct = correct;
}

Question.prototype.displayQuestion(){
console.log(this.question);

for(var i=0; i<this.answers.length; i++){
console.log(i +" :" + this.answers[i]);
}
}

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您需要为原型分配一个函数。

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Question.prototype.displayQuestion = function() {
// ...
};

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function Question(question, answers, correct) {
this.question = question;
this.answers = answers;
this.correct = correct;
}

Question.prototype.displayQuestion = function() {
console.log(this.question);
for (var i = 0; i < this.answers.length; i++) {
console.log(i +" :" + this.answers[i]);
}
}

var question = new Question(['q1', 'q2', 'q3'], ['a', 'b', 'c'], []);

question.displayQuestion();

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