datatables + button onclick code example

Example: datatable buttons

dom: 'Blfrtip',
    buttons: [
        {
            extend: 'excelHtml5',
            footer: true,
        },
        {
            extend: 'csvHtml5',
            footer: true,
        },
        {
            extend: 'pdfHtml5',
            footer: true,
        },
    ],
    lengthMenu: [[10, 25, 50, 100, -1], [10, 25, 50, 100, "All"]],