pls what does it means div class=selected and other class

Question

div in html

Answer 1

This is not the way to write the class correct method is class="selected" the value of a attribute should always be given in a quots .

And second thing selected is a attribute of html form elements ok.

Answer 2

i dont understand

Answer 3

still

Answer 4

https://www.w3schools.com/html/html_classes.asp

Have a look friend