Javascript:void (0) Usage explanation

Javascript:void (0) means nothing! He is not a page URL, but a JavaScript statement void (0), Void is an operator that specifies that an expression is to be evaluated but does not return a value, the expression to be evaluated is "0", so , this is basically a pit dad's writing, completely fooled browser.

If you hover over a link and the target address of the link is displayed on the status bar at the bottom of the browser, the author of the page wants the link to be clicked not to jump directly to a new page, but to perform other actions (such as a preset JS function).

Then why add this? Because the "href" argument in the linked HTML code (link) is not empty, when clicked, the page will automatically jump, if the specified "href" is not legitimate, the page will jump to itself, that is, refresh, if you want to use the link to do something else? Then we're going to " HREF "Specifies a valid parameter that does not refresh the page, so" javascript:void (0) "comes in handy, so we can change the link so that clicking on the link triggers the onclick event, and the page itself does not refresh and the task is reached.