button style in jquery datatable code example

Example: button style in jquery datatable

$(document).ready(function() {
    $('#example').DataTable( {
        dom: 'Bfrtip',
        buttons: [
            {
                extend:    'copyHtml5',
                text:      '',
                titleAttr: 'Copy'
            },
            {
                extend:    'excelHtml5',
                text:      '',
                titleAttr: 'Excel'
            },
            {
                extend:    'csvHtml5',
                text:      '',
                titleAttr: 'CSV'
            },
            {
                extend:    'pdfHtml5',
                text:      '',
                titleAttr: 'PDF'
            }
        ]
    } );
} );