Function trigger

src/baseWrapper.ts:372–394

(eventString: string, options?: TriggerOptions)

  ): Promise<void>
  async trigger(eventString: string, options?: TriggerOptions): Promise<void>
  async trigger(eventString: string, options?: TriggerOptions) {
    if (options && options['target']) {
      throw Error(
        `[vue-test-utils]: you cannot set the target value of an event. See the notes section ` +
          `of the docs for more details—` +
          `https://vue-test-utils.vuejs.org/api/wrapper/trigger.html`
      )
    }

    if (this.element && !this.isDisabled()) {
      const event = createDOMEvent(eventString, options)
      // see https://github.com/vuejs/test-utils/issues/1854
      // fakeTimers provoke an issue as Date.now() always return the same value
      // and Vue relies on it to determine if the handler should be invoked
      // see https://github.com/vuejs/core/blob/5ee40532a63e0b792e0c1eccf3cf68546a4e23e9/packages/runtime-dom/src/modules/events.ts#L100-L104
      // we workaround this issue by manually setting _vts to Date.now() + 1
      // thus making sure the event handler is invoked
      event._vts = Date.now() + 1
      this.element.dispatchEvent(event)
    }

    return nextTick()
  }
}