IRCCloud Bookmarklet to load all unread messages in the current channel (continuously loads history for up to one minute).

gistfile1.js

javascript:(function() {
	if (!cbv && !cbv.scroll)
		return;
	var THREE_SECONDS = 3000;
	var ONE_MINUTE = 20 * THREE_SECONDS;
	var backlogTimer;
	var backlogTimerNotice = $('<div style="position:absolute;top:50px;left:50px;padding:20px;border:thick solid black;background-color:white;">Loading unread messages... </div>');
	var cancelBacklogTimer = function() {
		clearTimeout(backlogTimer);
		backlogTimerNotice.remove();
	};
	var cancelLink = $('<a href="#">(cancel)</a>').click(cancelBacklogTimer);
	backlogTimerNotice.append(cancelLink);
	loadBacklog = function() {
	    if (!cbv().scroll.isLastSeenMessageRendered()) {
	    	cbv().scroll.loadBacklog();
	    } else {
	    	cbv().scroll.scrollTo(10);
	    	backlogTimerNotice.remove();
	    	if (backlogTimer)
		    	clearTimeout(backlogTimer);
	    }
	};
	$('body').append(backlogTimerNotice);
	loadBacklog();
	backlogTimer = setInterval(loadBacklog, THREE_SECONDS);
	setTimeout(cancelBacklogTimer, ONE_MINUTE);
}());