What is rel="stylesheet "?how it's work?

Answer 1

Defines the frame or window name that has the defined linkingrelationship or that will show the rendering of any linked resource. title. The title attribute has special semantics on the <link> element. When used on a <link rel="stylesheet"> it defines a preferred or an alternatestylesheet

Answer 2

Allowed values in <link> 'rel' attribute:

alternate, author, help, icon... and many more that you can find here:
https://www.w3schools.com/tags/att_link_rel.asp

Answer 3

why u replace stylesheet. what problem u faced in stylesheet

Answer 4

what I can use to replace stylesheet?