Home
JS
JS
Tryit: JAVASCRIPT
运行 ❯
×
Change Orientation
Change Theme, Dark/Light
<!DOCTYPE html> <html> <body> <h2>JavaScript Object.defineProperty()</h2> <p>此示例向对象添加新属性。</p> <p id="demo"></p> <script> // 创建一个对象： var person = { firstName: "John", lastName : "Doe", language : "EN" }; // Add a property Object.defineProperty(person, "year", {value:"2008"}) document.getElementById("demo").innerHTML = person.year; </script> </body> </html>