Dear masters
I would like to ask a question, why does HTML writing

not correspond to

and the browser can still display the content?
I hope you can give me some advice, thank you in advance

Reply to discussion (solution)

Browser fault tolerance
It won’t work if you use xhtml or xml, these two standards do not allow errors
Major browser vendors bypassed w3c and spontaneously restarted the html5 project, collectively boycotting xhtml. This is one of the reasons

Well! Thank you, master, for the lesson!