javascript: With Javascript:void (0) Introduction

You see JavaScript scripts often see code like this:
〈a href= "Javascript:dotest2 (); void (0);" 〉here〈/a〉
But what does void (0) here mean?
In JavaScript, Void is an operator that specifies that you want to evaluate an expression but not return a value.

void operator usage format is as follows:
1. javascript:void (expression)
2. Javascript:void expression

Expression is an expression of the JavaScript standard to compute. The parentheses outside the expression are optional, but writing is a good habit.

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

The following code creates a hyperlink that will not happen when the user clicks on it. When the user clicks on the link, void (0) evaluates to 0, but there is no effect on JavaScript.

The difference between void and #

# contains a location information the default anchor point is #top, which is the top of the page, and javascript:void (0) only represents a dead link.

This is why sometimes the page is very long browsing links obviously is # but it beats to the top of the page, and javascript:void (0) is not so it is best to invoke a script with void (0).