你可以使用字符来定义和创建 JavaScript 对象 - 在线编辑器

<p>创建 JavaScript 对象。</p>
<p id="demo"></p>
<script>
  var person = {
    firstName: "John",
    lastName: "Doe",
    age: 50,
    eyeColor: "blue"
  };
  document.getElementById("demo").innerHTML =
    person.firstName + " 现在 " + person.age + " 岁.";
</script>
 
<p>创建 JavaScript 对象。</p>
<p id="demo"></p>
<script>
  var person = {
    firstName: "John",
    lastName: "Doe",
    age: 50,
    eyeColor: "blue"
  };
  document.getElementById("demo").innerHTML =
    person.firstName + " 现在 " + person.age + " 岁.";
</script>