<!DOCTYPE html> <html> <body> <h1>JavaScript Object.defineProperty()</h1> <p>本例会更改属性值。</p> <p id="demo"></p> <script> // 创建对象: const person = { firstName: "Bill", lastName: "Gates", language: "EN" }; // 更改属性 Object.defineProperty(person, "language", {value:"ZH"}) document.getElementById("demo").innerHTML = person.language; </script> </body> </html>