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<!DOCTYPE html> <html> <body> <h1>JavaScript 对象</h1> <h2>Object.keys() 方法</h2> <p>Object.keys() 返回带有对象键的 Array Iterator 对象：</p> <p id="demo"></p> <script> const person = { firstName: "Bill", lastName: "Gates", age: 19, eyeColor: "blue" }; const keys = Object.keys(person); document.getElementById("demo").innerHTML = keys; </script> <p>Internet Explorer 11（及更早版本）不支持 Object.keys()。</p> </body> </html>