W3School TIY Editor
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暗黑模式
运行代码
<!DOCTYPE HTML> <html> <body> <form action="/example/html5/demo_form.asp" method="get"> Username: <input type="text" name="usr_name" /> Encryption: <keygen name="security" autofocus="autofocus" /> <input type="submit" /> </form> </body> </html>