What does Javascript:void(0) mean and how to use it in JavaScript?

In our dailyJavaScriptdevelopment, 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 anexpressionbut 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:

1. Usage of Javascript:void(0)

javascript:void(0) means no action is taken. For example:

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:

here

Several ways to link

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

2. Usecustom function

 徐州 window.location.href=""

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.

2 In fact, we can use, this sentence will perform a submit operation. So under what circumstances is void(0) used more often? Without refresh, of course it is Ajax. If you look at the Ajax web page, you will generally see a lot of void(0), :), so when using void(0 ) before, it is best to think about whether this page needs to be refreshed as a whole

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

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