运行 ❯
获取您
自己的
网站
×
更改方向
保存代码
更改主题，暗/亮
前往 Spaces
<!DOCTYPE html> <html> <body> <h1>JavaScript Objects</h1> <h2>The Object.keys() Method</h2> <p>Object.keys() returns an enumerable array of the keys of an object:</p> <p id="demo"></p> <script> // Create an Object const person = { firstName: "John", lastName: "Doe", age: 50, eyeColor: "blue" }; // Get the Keys const keys = Object.keys(person); document.getElementById("demo").innerHTML = keys; </script> <p>Object.keys() is not supported in Internet Explorer.</p> </body> </html>
