Function trigger

packages/tabs/index.ts:138–148

(eventName: string, child?: TrivialInstance)

    },

    trigger(eventName: string, child?: TrivialInstance) {
      const { currentIndex } = this.data;

      const data = this.getChildData(currentIndex, child);

      if (!isDef(data)) {
        return;
      }

      this.$emit(eventName, data);
    },

    onTap(event: WechatMiniprogram.TouchEvent) {
      const { index } = event.currentTarget.dataset;