运行 ❯
获取您
自己的
网站
×
更改方向
保存代码
更改主题，深色/浅色
前往 Spaces
<!DOCTYPE html> <html> <body> <h1>JavaScript Object Properties</h1> <h2>Adding a new Property</h2> <p id="demo"></p> <script> const person = { firstname: "John", lastname: "Doe", age: 50, eyecolor: "blue" }; person.nationality = "English"; document.getElementById("demo").innerHTML = person.firstname + " is " + person.nationality + "."; </script> </body> </html>
