如何只执行一次函数?

For example I have a function

例如，我有一个函数

Question.prototype.checkAnswer = function(answer1, answer2) {
   if (answer1.innerHTML  == this.correctAnswer) {
    console.log("correct");
    players1.moveCharacter = true;
    pointAmount+= 1;
    point.innerHTML = pointAmount;
  } else {
    console.log("nope")
  }
}

it the answer is correct id adds 1 point to the total amount of points. But the problem is that if I do not move to the next question in array and just keep clicking the answer button, I keep getting points for as much as I want before I decide to move on to the next question. How could I fix this so that only once I can answer the question and get only one point for it. I believe somehow I need to make sure that the function is ran only once?

它的答案是正确的id加1点到总点数。但问题是，如果我不移到数组中的下一个问题，继续点击答案按钮，在我决定进入下一个问题之前，我就会得到我想要的分数。我怎么能修正这个只有一次我才能回答这个问题并且只得到一点。我认为我需要确保函数只运行一次?

This is probably can be solved pretty easily but I'm new and can't think of anything.

这个问题很容易解决，但我是新手，什么都想不出来。

2 个解决方案

#1

You can use a simple flag, and set it to true once the function was called.

您可以使用一个简单的标志，并在函数被调用后将其设置为true。

function Question() {}

Question.prototype.checkAnswer = function(answer1, answer2) {
   
  if(this.answerChecked)
    return; // If answer was already checked, leave.
  
  this.answerChecked = true;
 
  // The rest of your code
  console.log('Run');
}

const question = new Question();

question.checkAnswer('yes', 'no');
question.checkAnswer('again', 'no'); // This will do nothing

#2

You can also check whether pointAmount > 0 before awarding any more points.

您还可以在授予更多积分之前检查切入点金额>。

#1