What does Javascript:void(0) mean and how to use it in JavaScript?
In our daily JavaScript development, we will encounter code like javascript:void(0). Many friends are confused when they see this and don’t know what it means. So this What does javascript:void(0) mean in JavaScript? Today we will take you to understand it together!
1. What does Javascript:void(0) mean and its meaning
The most critical thing in javascript:void(0) is the void key Word, void is a very important keyword in JavaScript. This operator specifies to evaluate an expression but does not return a value.
But what does void(0) here mean?
void operator usage format is as follows:
1. javascript:void (expression) 2. javascript:void expression
expression is a Javascript standard expression to be evaluated. The parentheses outside the expression are optional, but are a good practice to write. (Implementation version Navigator 3.0 )
The syntax format is as follows:
<head> <script type="text/javascript"> <!--void func()javascript:void func() 或者 void(func())javascript:void(func())//--> </script> </head>
1. Usage of Javascript:void(0)
javascript:void(0) means no action is taken. For example:
<a href="javascript:void(0);" onclick="alert('ok');"></a>
This means that this link does not jump and executes the onClick event.
I think this code is common among those who have used ajax:
<a href="javascript:doTest2();void(0);">here</a>
Several ways to link
1.window.open (''url'')
2. Use custom function
Summary:
1 void(0) is used to perform certain processing, but does not refresh the page as a whole In this case, but if you need to refresh the page, you need to be careful. 3 To put it bluntly, href="#" will refresh the page as a whole, while href="javascript:void(0)" Otherwise Related recommendations: 1.Let’s talk about javascript that is often used in static pages: ; and javascript:void(0) 2. Analysis of the difference between a tag href=# and href=javascript:void(0) in html 3.Use javascript:void(0) with caution, why is it not good to write like this The above is the detailed content of What does Javascript:void(0) mean and how to use it in JavaScript?. For more information, please follow other related articles on the PHP Chinese website!<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)">徐州</a>
window.location.href=""
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