<!DOCTYPE html> <html> <body> <h1>JavaScript Object.getOwnPropertyNames()</h1> <p>本例列出一个对象的属性。</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", {enumerable:false}); // 显示属性 document.getElementById("demo").innerHTML = Object.getOwnPropertyNames(person); </script> </body> </html>