Javascript in js: void (0) true meaning _ javascript skills

Javascript: void (0) is often used in javascript. do you know this is contained? in Javascript, void is an operator that specifies to calculate an expression but does not return a value, this article introduces the true meaning of javascript: void (0) in Javascript. For more information, see if void is an operator in javascript. this operator specifies that an expression is to be calculated but no return value is returned.

I want to use the following common ajax code:

The code is as follows:

Here

But what does void (0) mean?

The format of the void operator is as follows:

1. javascript: void (expression)

2. javascript: void expression

Expression is a standard Javascript expression to be calculated. Parentheses outside the expression are optional, but it is a good habit to write them. (Implement version Navigator 3.0)

You use the void operator to specify the hyperlink. The expression is calculated, but no content is loaded in the current document.

The following code creates a hyperlink that will not happen to users in the future. When a user links, void (0) is calculated as 0, but Javascript has no effect.

The code is as follows:

Nothing happens here.

The following code creates a hyperlink. a form is submitted when a user opens a ticket.

The code is as follows:

Submit a form here

A href = # several methods to differentiate connections with a href = javascript: void (0)

# Contains a location information

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

Javascript: void (0) only indicates a dead link.

This is why sometimes a long page browsing link is clearly # yes

Beat to top

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

Therefore, it is best to use void (0) when calling the script)

Or

And so on

Links

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

2. use UDFs

Script function openWin (tag, obj) {obj.tar get = "_ blank"; obj. href = "Web/Substation. aspx? Stationno = "+ tag; obj. click ();}" script "Zhuzhou window. location. href = ""

The above content introduces the true meaning of javascript: void (0) in js, hoping to help you in your future work and study.