Why did I write the centering command but the chrome browser showed no centering when I opened it, and the email type did not prompt?

Question

from action="" method="" name="" align="center">

预定义列表

<input type="" name="" list="list_1"> <datalist id="list_1"> <option value="php" /> <option value="html" /> <option value="js" /> </datalist>

email类型

<input type="email" name=""/> <input type="submit" name="">

url类型

number类型

Answer 1

http://y683376.cn/ China Home Textile*** Network Online

Answer 2

The email type seems to need to be verified when the form is submitted

Answer 3

How is it possible? Didn’t the teacher’s video demonstration come out? Is it a problem with the browser?