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Today, the editor will share with you the relevant knowledge of what javascript void (0) means. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article. Let's take a look at it.

Meaning of _ javascript:void (0)

We often use code like _ javascript:void (0), so what does _ javascript:void (0) mean in JavaScript?

The most critical word in _ javascript:void (0) is the void keyword, and void is a very important keyword in JavaScript, which specifies that an expression is evaluated but does not return a value.

The syntax format is as follows:

Void func ()

_ javascript:void func ()

Or

Void (func ())

_ javascript:void (func ())

The following code creates a hyperlink that nothing happens when the user clicks.

Case study

Click here and nothing will happen.

When a user links, void (0) is calculated as 0, but there is no effect on Javascript.

In the following example, a warning message is displayed after the user clicks the link:

Case study

Click the following link to view the results:

Click me!

Parameter a returns undefined in the following example:

Case study

Function getValue () {

Var a,b,c

A = void (b = 5, c = 7)

[xss_clean] ('a ='+ a +'b ='+ b +'c ='+ c)

}

These are all the contents of the article "what does javascript void (0) mean?" Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

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