Javascript 如何在Vue中的不同文件中使用函数

我是vue的新手，我正在尝试使用一个助手函数，arrayDateFormatter在我导入的一个.vue文件中。我试图在

mounted（）

中使用它，但它从未被调用，之后什么也没有我在控制台中没有收到任何错误

我的vue文件

<template>
.....
</template>

<script>
import archives from "@/4.objects/o-archives";
import fullBanner from "@/4.objects/o-full-banner";
import speakerInfo from "@/4.objects/o-speaker-info";
import newsletter from "@/4.objects/o-newsletter";
import dataLoaderMixin from "@/mixins/dataLoader-mixin";
import arrayDateFormatter from "../mixins/gloabalEventsDateFormate-mixin";

export default {
  components: {
   ....
  },
  mixins: [dataLoaderMixin],
  data() {
    return {
      speakers: [],
      talkInfo: null,
      archives: []
    };
  },
  async mounted() {
    try {
      const response = await this.fetchEventsByProject();
      console.log(response.data.data.listOnlineEvents.items);
      //nothing gets triggered after here
      const currentEvent = arrayDateFormatter(response);
      console.log('current event');
      console.log(currentEvent);
      this.archives = this.fetchData("archive");
    } catch (err) {
      return err
    }
  }
};
</script>

---

看来我必须这样导入文件

import {arrayDateFormatter} from "../mixins/gloabalEventsDateFormate-mixin";

import {arrayDateFormatter} from "../mixins/gloabalEventsDateFormate-mixin";