wikimedia/mediawiki-extensions-UploadWizard

( function () {

    OO.ui.getWindowManager().addWindows( {
        upwizErrorDialog: new OO.ui.MessageDialog( { size: 'medium' } )
    } );

    /**
     * Displays an error message.
     *
     * @param {jQuery|string} errorMessage
     * @param {string} [title]
     */
    mw.errorDialog = function ( errorMessage, title ) {
        OO.ui.getWindowManager().openWindow( 'upwizErrorDialog', {
            message: new OO.ui.HtmlSnippet( errorMessage ),
            title: title || mw.message( 'mwe-upwiz-errordialog-title' ).text(),
            verbose: true,
            actions: [
                {
                    label: mw.message( 'mwe-upwiz-errordialog-ok' ).text(),
                    action: 'accept'
                }
            ]
        } );
    };

}() );