我认为，你用了一个错误的方法来显示你的结果。您可以使用控制台。log（）或JSON。stringify（）像这样
1.使用控制台。log
console.log（）;
1.JSONstringify（）
document.body.innerText = JSON。stringify（twoYearOldCars）;
现在让我们看看代码看起来如何

let carsArray = [
    {
      make: "BMW",
      model: "325i",
      year: 2034,
    },
    {
      make: "Volvo",
      model: "540xi",
      year: 2025,
    },
    {
      make: "BMW",
      model: "435e",
      year: 1994,
    },
    {
      make: "BMW",
      model: "X6",
      year: 2025,
    },
  ];

  function twoYearsOld (element) {
    let year = element.year - 2023;
    return year === 2;
  };

let twoYearOldCars = carsArray.filter(twoYearsOld);

console.log(JSON.stringify(twoYearOldCars));

听起来你想“美化”数据。您可以stringify它，然后将它添加到<pre>元素中的<code>元素。ref1|参考文献2。

let carsArray=[{make:"BMW",model:"325i",year:2034},{make:"Volvo",model:"540xi",year:2025},{make:"BMW",model:"435e",year:1994},{make:"BMW",model:"X6",year:2025}];

function twoYearsOld(element) {
  return element.year - 2023 === 2;
}

const twoYearOldCars = carsArray.filter(twoYearsOld);

const code = document.querySelector('code');

// `stringify` accepts three arguments. The first is the data
// you want to stringify, the third is the space indentation.
// and the second is "the replacer" - you can read about
// that in the documentaton
code.textContent = JSON.stringify(twoYearOldCars, null, 2);

<pre><code></code></pre>