User:Animum/liveclock.js

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Documentation for this user script can be added at User:Animum/liveclock.

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/* 
* Modified version of [[User:AzaToth/liveclock.js]]
* This version has a feature that makes it, at most, only a few milliseconds ahead of the actual time.
*
* Yes, a few hundred milliseconds (the normal margin of error for these clocks) doesn't really make that much of a difference, 
* but I'm just that anal.
*/

function showTime() {
    var dateNode = liveClock.node;
    if(!dateNode) {
        return;
    }
    var now = new Date();
    var stabilizer = now.getUTCMilliseconds()/10;
    var hh = now.getUTCHours();
    var mm = now.getUTCMinutes();
    var ss = now.getUTCSeconds();
    var time = ( hh < 10 ? '0' + hh : hh ) + ':' + ( mm < 10 ? '0' + mm : mm ) + ':' + ( ss < 10 ? '0' + ss : ss ) + ', ' + now.getUTCDate() + ' ' + ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"][now.getUTCMonth()] + ' ' + now.getUTCFullYear() + ' (UTC)';
    if(dateNode && dateNode.firstChild && dateNode.firstChild.firstChild) dateNode.firstChild.replaceChild(document.createTextNode(time), dateNode.firstChild.firstChild);
    if(stabilizer < 1) { //Being under 10 milliseconds ahead is reasonably accurate.
        window.setTimeout(showTime, 1000);
    } else {
        window.setTimeout(showTime, 1000-(stabilizer*10)); //Trying to get the clock as accurate as possible
    }
}
 
function liveClock() {
        liveClock.node = mw.util.addPortletLink('p-personal', mw.config.get('wgServer') + mw.config.get('wgScriptPath') + '/index.php?title=' + mw.config.get('wgPageName') + '&action=purge' , '', 'utcdate');
        liveClock.node.style.fontWeight = 'normal';
        liveClock.node.style.textTransform = 'none';
        
        showTime();
}
 
$(liveClock);