User:Harmicelli/global.js

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var user = mw.config.get( 'wgRelevantUserName' );
if( user !== null && !mw.util.isIPAddress(user) ){
    mw.util.addPortletLink(
        'p-tb',
        mw.util.getUrl( 'Special:CentralAuth/' + user),
        'Central Auth',
        't-centralauth',
        'グローバルアカウント情報を見る'
    );
}