portainer/app/docker/components/host-view-panels/node-availability-select/node-availability-select-controller.js

angular
  .module('portainer.docker')
  .controller('NodeAvailabilitySelectController', [
    function NodeAvailabilitySelectController() {
      this.onChange = onChange;

      function onChange() {
        this.onSave({ availability: this.availability });
      }
    }
  ]);