Method once

common/src/util/saxy.ts:88–88

(event: U, listener: SaxyEvents[U])

  on<U extends SaxyEventNames>(event: U, listener: SaxyEvents[U]): this
  on(event: string | symbol | Event, listener: (...args: any[]) => void): this
  once<U extends SaxyEventNames>(event: U, listener: SaxyEvents[U]): this
}

/**