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Question

I've seen such href s many times but I don't know what exactly that means.

Midhun T P · Answer

Hi In most cases this is used to avoid the default property of anchor tags i.e the redirection of pages to the href link. Giving href like this will return undefined and hence no default action will be done while clicking on that anchor tag. You have also noted giving href value as # which is also used to achieve the same result.

Suraj Pant · Answer

Void return undefined. So most of the cases its added so that by default a undefined value can be set. And later based on Id it can be overwritten to an actual URL.

<a href="javascript:void(0)" id="loginlink">login</a>