User:Niedzielski/global.js

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Documentation for this user script can be added at User:Niedzielski/global.

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// https://www.mediawiki.org/wiki/Extension:EventLogging/Guide#QA
var $el = $( '<pre style="background: yellow; margin: 0; padding: 8px; position: fixed; top: 0; width: 100%; z-index: 99"></pre>' );
$el.click( function () { $el.empty().detach(); } );
mw.trackSubscribe( 'eventlogging.error', function ( topic, err ) {
    $el.text( function ( idx, text ) {
        return ( text && text + '\n' ) + err;
    } ).appendTo( 'body' );
} );