HTML5: How to specify that the dialog element is active and that the user can interact with it?

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HTML Code:

<!DOCTYPE html> <!-- HTML5 document type declaration -->
<html><!-- Start of HTML document -->
<head><!-- Start of head section -->
<meta charset="utf-8"><!-- Declares document character encoding -->
<title>Example of the dialog element with open attribute :</title><!-- Sets the title of the webpage -->
</head><!-- End of head section -->
<body><!-- Start of body section -->
<table border="2"><!-- Start of table element with border attribute set to 2 -->
<tr><!-- Start of table row -->
<th>March <dialog open>This is an open dialog window</dialog></th><!-- Table header cell containing a dialog element with the open attribute -->
<th>April</th><!-- Table header cell -->
<th>May</th><!-- Table header cell -->
</tr><!-- End of table row -->
<tr><!-- Start of table row -->
<td>31</td><!-- Table data cell -->
<td>30</td><!-- Table data cell -->
<td>31</td><!-- Table data cell -->
</tr><!-- End of table row -->
</table><!-- End of table element -->
</body><!-- End of body section -->
</html><!-- End of HTML document -->


  • This HTML document starts with a doctype declaration indicating it's an HTML5 document.
  • Inside the <html> tags, the document structure begins.
  • The <head> section contains metadata about the document, such as character encoding and the title.
  • The <body> section is where the visible content of the webpage resides.
  • The <table> element starts a table with a border attribute set to 2.
  • Inside the table, there are two rows (<tr>):
    • The first row contains three header cells (<th>):
      • The first header cell contains the text "March" followed by a dialog element with the open attribute.
      • The second header cell contains the text "April".
      • The third header cell contains the text "May".
    • The second row contains three data cells (<td>), each representing the number of days in each respective month.
  • The HTML document ends with the closing </html> tag.

Live Demo:

See the Pen dialog-open-answer by w3resource (@w3resource) on CodePen.

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