modal.vue

<template>
  <b-modal
        :active.sync="mostrarModalCobrar"
        aria-modal
        aria-role="dialog"
        has-modal-card
        :destroy-on-hide="true"
        trap-focus
      >
        <dialogo-cobrar
          @cobrado="onCobrado"
          :dispositivo="dispositivoParaCobrar"
        />
    </b-modal>
</template>