Details Tag HTML 5
Detail tag is use to show some detail information about something which you want display in such manner when user can show and details. Like in copyright information in example only copyright small message is displaying and if user wants show detail then he needs to click on arrow symbol.
Note: The details tag is not supported in Internet Explorer.
<summary>Copyright Girfa 2017</summary>
<p> Girfa Student Help</p>
<p>A Blog for IT student</p>