Detailed explanation of javascript:void(0) usage in js_javascript skills

javascript:void(0) means no action is taken. Such as:

This means that this link does not perform a jump action and executes the onClick event.

I think code like this is common among those who have used ajax:

But what does void(0) here mean?

void is an operator in Javascript, which specifies that an expression is to be evaluated but does not return a value.

void operator usage format is as follows:

1. javascript:void (expression)
2. javascript:void expression

expression is a Javascript standard expression to be evaluated. The parentheses outside the expression are optional, but are a good practice to write. (Implementation version Navigator 3.0 )

You can specify a hyperlink using the void operator. The expression will be evaluated but nothing will be loaded into the current document.

The code below creates a hyperlink that will cause nothing to happen to the user later. When the user links, void(0) evaluates to 0, but has no effect on the Javascript.

The following code creates a hyperlink that will cause the user to submit the form when clicking.

The difference between a href=# and a href=javascript:void(0) Several methods of linking

#Contains a location information

The default anchor is #top, which is the top of the web page

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

This is why sometimes the page is very long and the browsing link is clearly #是

Jumped to the top of the page

This is not the case with javascript:void(0)

So it’s best to use void(0)

or

<script>
   function openWin(tag,obj)
   {
    obj.target="_blank";
    obj.href = "Web/Substation/Substation.aspx&#63;stationno="+tag;
    obj.click();
   }
  </script>

<a href="javascript:void(0)" onclick="openWin(3,this)">徐州</a>

window.location.href=""