javascript:void(0) meaning

We often use code like javascript:void(0), so what does javascript:void(0) mean in JavaScript?

The most critical thing in javascript:void(0) is the void keyword. void is a very important keyword in JavaScript. This operator specifies to calculate an expression but does not return a value.

The syntax format is as follows:

     
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When the user links, void(0) evaluates to 0, but Nothing works on Javascript.

In the following example, a warning message is displayed after the user clicks the link:

      
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In the following example, parameter a will return undefined:

The difference between href="#" and href="javascript:void(0)"

# contains a location information, the default anchor is #top, which is the web page the upper end.

And javascript:void(0) only represents a dead link.

When the page is very long, # will be used to locate the specific location of the page. The format is: # + id.

If you want to define a dead link, please use javascript:void(0).

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