javascript:; with javascript:void (0) Introduction to use

Sometimes when we are writing JS, we need to trigger events without returning values, so we might need to write this.

href= "#" contains a location information. The default anchor is #top, which is the top of the page, which causes the browser to slow or even crash when you click the link continuously.

Of course we generally use three href= "# #", but read this article we can use javascript:;(a colon a semicolon)

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

javascript: Better, javascript:void (0); some cases are said to have browser-compatible bugs. (This point bug I do not know when can appear, know the children's shoes please advise).

Can be written javascript:;,qq space many are written in javascript:;
I feel that there is no difference between the two, is to execute an empty event.
javascript: Or even 7 fewer characters, huh.

Sina Weibo is written by javascript:void (0);

I've always written about javascript:void (0); but now it's all javascript:;

A href= "#" > click on the link, the page will scroll up to the top of the page, # The default anchor point is #TOP
<a href= "javascript:void (0)" onclick= "window.open ()" > Click the link, the page does not move, only the link is opened
<a href= "#" onclick= "Javascript:return false;" > function as above, different browsers will have differences.

Click the link, do not want to roll the page to the top of the page, with href= "javascript:void (0)", do not use href= "#", return false also has a similar effect

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

"#" contains a location information
The default anchor point is #top, which is the upper end of the page
and javascript:void (0) only represents a dead link
That's why there are times when the page is very long browse the link is obviously # but it beats to the top of the page
and javascript:void (0) is not so
So it's best to use void when calling scripts (0)
or <input onclick>.
<div onclick>, etc.
Several ways to open a new window link
1.window.open (' url ')
2. Using Custom Functions

Copy CodeThe code is as follows:
<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)" >LINK_TEST</a>

Window.location.href= ""
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If it is a #, there will be a jump to the top of the situation, the personal collection of several solutions:
1:<a href= "# # # ></a>
2:<a href= "javascript:void (0)" ></a>
3:<a href= "javascript:void (null)" ></a>
4:<a href= "#" onclick= "return false" ></a>
5:<span style= "Cursor:hand" ></span> (as if not shown in FF)
-------------------------------------------------------------------------------
Careful use of javascript:void (0)
Today, when debugging CGI, the CGI program has been executed, and the final result is correct, but the page is not refreshed. Under the FireFox2.0 test, the result is normal, IE6 but it does not refresh! After a closer look, the CGI page was found to be linked by <a href= "javascript:void (0)" onclick= "Xxx_func ();" ....> only a sample </a> The problem is in this void ( 0) on! Let's take a look at the meaning of Void (0) in javascript:
In JavaScript, Void is an operator that specifies that an expression is evaluated but does not return a value.
The void operator uses the following format:
1. Javascript:void (Expression_r_r)
2. Javascript:void Expression_r_r
Expression_r_r is an expression of the JavaScript standard to be computed. Parentheses on the outside of the expression are optional, but writing is a good habit. We can use the void operator to specify hyperlinks. The expression is evaluated but does not load anything at the current document. The code for the polygon creates a hyperlink that doesn't happen when the user clicks it. void (0) evaluates to 0 when the user clicks on the link, but does not have any effect on JavaScript.
<a href= "javascript:void (0)" > Click here Nothing will happen </a>
That is, you can use void (0) to perform some processing but not to refresh the page as a whole, but be careful when you need to refresh the page.
In fact, we can use <a href= "Javascript:void (Document.form.submit ())", this sentence will be a submit operation. Then what situation 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 before using void (0), it is best to think about whether this page needs a whole refresh.

When using JavaScript, we usually pass a similar:
<a href= "#" onclick= "javascript: Method" > Submit </a>
Way to invoke the JavaScript method through a pseudo-link. One of the problems with this approach is:
Although clicking on the link does not jump to the page. But the scrollbar rolls up, and the workaround is to return a false.
As shown below:
<a href= "#" onclick= "javascript: method; return false;" > Submit </a>

You can also use # # #

A href= "javascript:void (0)" onclick= "javascript: method; return false;" Submit
Javascript:void (0) will not jump upward:)

One more way is to #this
A href= "#this" onclick= "javascript: Method"

javascript:; with javascript:void (0) Introduction to use