kd-aiot-frontend-wt/lib/vue-form-making-v3/src/util/event-bus.js

import emitter from 'tiny-emitter/instance'

export const EventBus = {
  $on: (...args) => emitter.on(...args),
  $once: (...args) => emitter.once(...args),
  $off: (...args) => emitter.off(...args),
  $emit: (...args) => emitter.emit(...args),
}