W3School TIY Editor
W3School 在线教程
改变方向
暗黑模式
运行代码
<!DOCTYPE html> <html> <body> <h1>Document 对象</h1> <h2>implementation 属性</h2> <p>此文档是否具有 Tesla X 特征？</p> <p id="demo"></p> <script> let answer = document.implementation.hasFeature("TESLA", "X"); document.getElementById("demo").innerHTML = answer; </script> </body> </html>