使用Javascript在构造函数中使用正则表达式

Question

我在尝试定义构造函数的第三个属性时遇到了麻烦。当我评论this.partial = text.replace(cloze,'...');时它运行正常。 但是当我使用那行代码时，程序结束了中间查询器。我认为它与.replace()正则表达式有关。 这是我的代码：

var fs = require("fs");

var action = process.argv[3];
var count = process.argv[4];

function ClozeCard(text, cloze) {
    this.text = text;
    this.cloze = cloze;
    this.partial = text.replace(cloze,'...');
}

var inquirer = require('inquirer');

var cards = [];

var num = 0;

var start = {
    createCards: function() {
      if (num < count) {
        inquirer.prompt([
          {
            name: "text",
            message: "What is the Cloze-flashcard's text?"
          }, {
            name: "cloze",
            message: "What is the Cloze-flashcard's answer?"
          }
        ]).then(function (answers) {

          var newCard = new ClozeCard(answers.text, answers.cloze);
          if (answers.text.indexOf(answers.cloze) === -1) {
            console.log("The answer does not appear to be in the text. Try again");
            return;
          } else {
              cards.push(newCard);
              num++;
              fs.writeFile('cloze.txt', JSON.stringify(cards), function (err) {
                if (err) {
                    return console.log(err);
                }
              });
              start.createCards();
          }
        });
      }
    }
}

start.createCards();

module.exports = ClozeCard;