Question

I wish to load a list of webpages sequentially, with Greasemonkey.

var list = array ('http://www.google.com', 'site2', 'site3', 'site4');
window.location.href = list[0];

The script should work as follows: open site 1, wait 5 seconds, open site 2, wait 5 seconds, etc.

I don’t know how to make the script open sites in sequence, maybe compare the actual URL to the list and move on the next one(?).

Answer 1

This approach, for Chrome, will also work in Greasemonkey.

Put your sites in an array, like that, but you must also set your @include, @exclude, and @match directives to fire on the appropriate sites.

Putting it all together, here’s a complete script:

// ==UserScript==
// @name        Multipage, MultiSite slideshow of sorts
// @include     http://google.com/*
// @include     http://site2/*
// @include     http://site3/*
// @include     http://site4/*
// @grant       GM_addStyle
// ==/UserScript==
/*- The @grant directive is needed to work around a major design
    change introduced in GM 1.0.
    It restores the sandbox.
*/

var urlsToLoad  = [
    'http://google.com/'
    , 'http://site2/somepage/'
    , 'http://site3/somepage/'
    , 'http://site4/somepage/'
];

/*--- Since many of these sites load large pictures, Chrome's and 
    Firefox's injection may fire a good deal before the image(s) 
    finish loading.
    So, insure script fires after load:
*/
window.addEventListener ("load", FireTimer, false);
if (document.readyState == "complete") {
    FireTimer ();
}
//--- Catch new pages loaded by WELL BEHAVED ajax.
window.addEventListener ("hashchange", FireTimer,  false);

function FireTimer () {
    setTimeout (GotoNextURL, 5000); // 5000 == 5 seconds
}

function GotoNextURL () {
    var numUrls     = urlsToLoad.length;
    var urlIdx      = urlsToLoad.indexOf (location.href);
    urlIdx++;
    if (urlIdx >= numUrls)
        urlIdx = 0;

    location.href   = urlsToLoad[urlIdx];
}