安科网
源代码：
点击运行
<!DOCTYPE html> <html> <body> <p id="demo">Click the button to display the doctype name.</p> <button onclick="myFunction()">Try it</button> <script> function myFunction() { var x=document.getElementById("demo"); x.innerHTML=document.doctype.name; } </script> <p><strong>Note:</strong> In Internet Explorer 8 and earlier, the doctype property returns <em>null</em> for HTML and XHTML documents, and will only work for XML documents.</p> </body> </html>
运行结果
Copyright © 2013 - 2019 Ancii.com All Rights Reserved
京ICP备18063983号-5
京公网安备11010802014868号