MediaWiki:Common.js

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mw.hook('wikipage.content').add(function() {
    $('.mw-userlink').each(function() {
        var username = $(this).text();
        var img = $('<img>')
            .attr('src', 'https://crafatar.com/avatars/' + encodeURIComponent(username) + '?size=16&overlay')
            .css({ width: '16px', height: '16px', verticalAlign: 'middle', marginRight: '4px', imageRendering: 'pixelated' });
        $(this).prepend(img);
    });
});