点击运行
<!DOCTYPE html> <html> <body> <h1>使用括号表示法修改 JavaScript 对象：</h1> <p id="demo"></p> <script> var myObj, x; myObj = { name: "Bill Gates", age: 62, city: "Seattle" }; myObj["name"] = "Steve Jobs"; document.getElementById("demo").innerHTML = myObj.name; </script> </body> </html>
运行结果
