Javascript:void (0) True meaning

Source: Internet
Author: User

This code is common to everyone:
<a href= "Javascript:dotest2 (); void (0);" >here</a>
But what is the meaning of void (0) here?

The void in JavaScript is an operatorThis operator specifies that an expression is to be evaluated but does not return a value

The void operator uses the following format:
1. javascript:void (expression)
2. Javascript:void expression

Expression is a standard of Javascript to evaluate. Parentheses on the outside of the expression are optional, but writing is a good habit. (Implementation version Navigator 3.0)

You use the void operator to specify a hyperlink. The expression is evaluated but does not load any content at the current document.

The following code creates a hyperlink that will not happen to the user in the future. void (0) evaluates to 0 when the user links, but does not have any 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 it.
<a href= "Javascript:void (Document.form.submit ())" >
Submit form here </A>
A href= #与 a href=javascript:void (0) A few ways to link the difference

#包含了一个位置信息

The default anchor 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 long and the link is # 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)


Reprint Address: http://www.cnblogs.com/opper/archive/2009/01/12/1373971.html

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

Javascript:void (0) true meaning

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