How to execute some jQuery or JavaScript code after a redirect has completed

Question

How can I execute jQuery/JS code as soon as a jQuery/JS redirect like...

$(location).attr('href','/target_path');

...or...

window.location.href = "/target_path";

...has finished loading the new page?

Specifically, I need to pass an alert message and insert it into and display it (enclosed in some HTML) on the new page.

Answer 1

You can't. Once the redirect happens you are no longer on that page. You can't execute code on a page you are no longer on. If you want the next page to do something then you need to pass, either by cookie or URL parameter, a flag that instructs it to do so.

Answer 2

It is impossible to tell JavaScript to execute some code after a redirect.

However you have different options:

1. Pass a string in the redirect URL and then do something on "ready"
2. Store some information in a cookie and then do something on "ready"
3. Store some data using DOM storage (namely sessionStorage) if you don't mind the smaller browser support