The true meaning of javascript:void(0) in js_javascript skills

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

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

Copy code The code is as follows:

3aca98d048feecd64332d688d99c755ahere5db79b134e9f6b82c0b36e0489ee08ed

But what does void(0) here mean?

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.

Copy code The code is as follows:

92089eb7775f8b2da9a0f317f5f010abNothing will happen here63505a6f727f70c8bd4066f3066dcb9d

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

Copy code The code is as follows:

40cf5f64c15043244209fb8b7cc02494Submit form here63505a6f727f70c8bd4066f3066dcb9d

The difference between a href=# and a href=javascript:void(0) Several ways to link

#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)

when calling a script

or7ce8961e120a815eeb46b3f04acc755f

414cf55ed2331ac9b67428e512c358bcetc.

Several ways to link

1.window.open(''url'')

2. Use custom functions

 <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)">株洲</a>
window.location.href=""

The above content introduces the true meaning of javascript:void(0) in js. I hope it will be helpful to everyone’s future work and study.