How does one implement the website password record function?

Is it implemented by saving the user name and password in the cookie? If so, isn't this safe? Or in other ways? Is it implemented by saving the user name and password in the cookie? If so, isn't this safe?
Or in other ways?

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Is it implemented by saving the user name and password in the cookie? If so, isn't this safe?
Or in other ways?

It is to record a cookie and set its expiration time.

For example, if you want to save a day, you can set it to 24*3600 seconds, and so on.

CookieImplementation

Record two cookies, one with the user name, and the other with the user name, password, and salt encrypted strings.

Server: Use the username obtained from the first cookie to query the database to obtain the salt and password, and then calculate and compare it with the second cookie.

That's probably the case. How did I do it?

How to make a secure "remember me" Function