sweet alert js

                                    Swal.fire({
    title: 'example text',
    buttonsStyling: false,
    customClass: {
    	confirmButton: 'example-class' //insert class here
    }
})

                                    <script src="https://unpkg.com/sweetalert/dist/sweetalert.min.js"></script>

                                    swal({
     title: "Deleted!",
     text: "Your row has been deleted.",
     button: "Close", // Text on button
     icon: "success", //built in icons: success, warning, error, info
     timer: 3000, //timeOut for auto-close
      buttons: {
        confirm: {
          text: "OK",
          value: true,
          visible: true,
          className: "",
          closeModal: true
        },
        cancel: {
          text: "Cancel",
          value: false,
          visible: true,
          className: "",
          closeModal: true,
        }
      }
     });

                                    <script src="https://cdn.jsdelivr.net/npm/sweetalert2@9"></script>

                                    swal("Good job!", "You clicked the button!", "success");