How can I redirect some page with javascript in Greasemonkey? [duplicate]

Question

This question already has an answer here:

• Redirect faster with Greasemonkey (or similar userscript engine)? 3 answers

Hey, I want to redirect a page when it finish loading...

For example, when google.com finish loading, I want to send a javascript to search something...

How can I do it ?

Answer 1

This is simply how I would go about redirecting:

//==UserScript==
// @name Redirect Google
// @namespace whatever.whatever...
// @description Redirect Google to Yahoo!
// @include http://www.google.com
// @include http://www.google.com/*
// @include http://*.google.com/*
//==/UserScript==
window.location = "http://www.yahoo.com"

... of course replacing the Google and Yahoo! URLs with something else. You don't need any external libraries (jQuery) or something complicated like that.

I would not reccomend this as it is more of a nuisance than a help to the end user, however that depends on what the function of the script is.

Answer 2

Use window.location.replace(url) if you want to redirect the user in a way that the current page is forgotten by the back button, because otherwise if you use window.location = url then when the user presses the back button, then the userscript will kick in again and push them back the page that they were just on.

Answer 3

This method is the most flexible that I've found so far. It's easy to specify multiple redirects in a single script:

// ==UserScript==
// @name       Redirector
// @namespace  http://use.i.E.your.homepage/
// @version    0.1
// @description  enter something useful
// @match      http://*/*
// @copyright  2012+, You
// @run-at document-start
// ==/UserScript==

//Any page on youtube.com is automatically redirected to google.com - you can use this
//function to redirect from any page to any other page.
redirectToPage("http://www.youtube.com/", "http://www.google.com");
//You can put several of these redirects in a single script!
redirectToPage("en.wikipedia.org", "http://www.stackoverflow.com");


function redirectToPage(page1, page2){
if(window.location.href.indexOf(page1) != -1){
    window.location.href = page2;
}
}