Form action JavaScript void

Using JavaScript:Void(0) can eliminate the unwanted side-effect, because it will return the undefined primative value. Form action JavaScript void is used with hyperlinks.

<a href="javascript:void(0)">Link</a>

Form action JavaScript void

Simple example code used Form action=javascript:void to prevent the page from reloading when the button is clicked the first time.

<!DOCTYPE html>
<html>
   <body>
      <a href="javascript:void(0);" ondblclick="alert('Click it twice!')">Click me not once, but twice.</a>
   </body>
</html>

Output:

When doing this, you can use event.preventDefault() within an onclick event handler to prevent the page from refreshing.

Do comment if you have any doubts or suggestions on this Js form action topic.

Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version

Form action JavaScript void