Try it Editor: html5_details

Edit This Code :



<!DOCTYPE html>
<html>
<body>

<details open>
  <summary>Copyright 1999-2018.</summary>
  <p> - by Refsnes Data. All Rights Reserved.</p>
  <p>All content and graphics on this web site are the property of the company Refsnes Data.</p>
</details>

<p>This example demonstrates a details list which is open by default.</p>

<p><b>Note:</b> The details tag is not supported in Internet Explorer.</p>

</body>
</html>

Result :

html5_details_open