Javascript:void (0); What does that mean?

In JavaScript, Void is an operator that specifies that an expression is evaluated but does not return a value.

void operator usage format is as follows:
1. javascript:void (expression)
2. Javascript:void expression

Expression is an expression of the Javascript standard to compute. The parentheses on the outer side of the expression are optional, but it is a good habit to write. (Implementation version Navigator 3.0)

You specify the hyperlink using the void operator. The expression is evaluated but no content is loaded at the current document.

The following code creates a hyperlink that will not happen after the user. When the user links, void (0) evaluates to 0, but there is no effect on Javascript.

<a href= "javascript:void (0)" > single here Nothing will happen </A>

The following code creates a hyperlink that submits the form when the user orders.

<a href= "Javascript:void (Document.form.submit ())" >
Submit form here alone </A>

The following code executes the SUBGO () function,

<a href= "javascript:void (0)" onclick= "Subgo ()" > Dot i </a>

Here, javascript:void (0), which does not have an actual function, is just a dead link, and the function is Subgo ().

<a href= "#" onclick= "Subgo ()" > Dot i </a> <a href= "javascript:void (0)" onclick= "Subgo ()" > Dot i </a> Difference。

In fact #包含了一个位置信息默认的锚是 #top is the top of the page, and javascript:void (0) only represents a dead link, without any information. So the best time to invoke a script is void (0)

JS several ways to jump:
1.window.open ("url")
2. Use Custom function
<script>
function Openwin (tag,obj)
{
Obj.target= "_blank";
Obj.href = "web/substation/substation.aspx?stationno=" +tag;
Obj.click ();
}
</script>
<a href= "javascript:void (0)" onclick= "Openwin (3,this)" > Dot i </a>

3 window.location.href= ';

Summary：

1 in other words, you can use void (0) If you want to perform some processing, but not refresh the page as a whole, but be careful when you need to refresh the page.

2 In fact, we can use <a href= "javascript:void (Document.form.submit)" ", this sentence will be a submit operation. What is the case with void (0) More, no refresh, of course, Ajax, look at the AJAX Web page, you will generally see a lot of void (0),: So in the use of void (0) before, it is best to think about whether this page needs to refresh the whole

3 Plainly, href= "#" This form will refresh the page as a whole, while href= "javascript:void (0)" will not