Utilizing an asynchronous function in ES6 Vue.js and TypeScript

Question

Utilizing an asynchronous function in ES6 Vue.js and TypeScript

I'm currently working on optimizing my code for reusability, and I've decided to store multiple async functions in a separate file.

blog.ts


import db from '@/firebase/init'

async function fetchTags (uid) {
  const tags = db.collection('tags').where('blogId', '==', uid)
  const data = []

  await tags.get()
    .then(snapshot => {
      snapshot.forEach(doc => {
        console.log(doc.data())
        data.push(doc.data().tag)
      })
      return data
    })
    .catch(error => {
      console.log('Error fetching documents', error)
    })
}

export default fetchTags

anotherpage.vue

<script>
import { fetchTags } from '@/functions/blog'

mounted () {
  if (this.$route.params.blog) {
    this.blog = this.$route.params.blog
  }
  fetchTags(this.blog.uid)
}

An error message is returned stating that:

vue.runtime.esm.js?2b0e:619 [Vue warn]: Error in mounted hook: "TypeError: Object(...) is not a function"

found in

---> <EditBlog> at src/components/admin/admin/Blog/EditBlog.vue
       <CreateBlog> at src/components/admin/admin/Blog/CreateBlog.vue
         <LayoutDefault> at src/App.vue
           <Root>

If anyone knows of a guide that explains the correct way to import these functions, please share it with me.

javascript typescript vue.js

Answer 1

Answer №1

When importing modules, make sure to match named exports with the correct import syntax. If you have a default export in your module, such as

import getTags from '@/functions/blog'

, you can use it without specifying a variable name.

To utilize named exports instead of default exports for multiple functions in one file, simply remove the default keyword from your function declaration. This allows you to selectively import specific functions by their names.

If you're interested in learning more about named exports versus default exports in ES6, check out this informative blog post here.

Take a look at an example of how a file (blog.ts) with multiple named exports would appear:

export async function getTags(uid) {
  // code here
}

export async function getLaundry(uid) {
  // additional code here
}

In another file where you want to import only specific functions, like getLaundry, you can do so using:

import { getLaundry } from '@/functions/blog'

Alternatively, if you need both functions imported, you can use:

import { getLaundry, getTags } from '@/functions/blog'

Answer 2

When importing modules, make sure to match named exports with the correct import syntax. If you have a default export in your module, such as

import getTags from '@/functions/blog'

, you can use it without specifying a variable name.

To utilize named exports instead of default exports for multiple functions in one file, simply remove the default keyword from your function declaration. This allows you to selectively import specific functions by their names.

If you're interested in learning more about named exports versus default exports in ES6, check out this informative blog post here.

Take a look at an example of how a file (blog.ts) with multiple named exports would appear:

export async function getTags(uid) {
  // code here
}

export async function getLaundry(uid) {
  // additional code here
}

In another file where you want to import only specific functions, like getLaundry, you can do so using:

import { getLaundry } from '@/functions/blog'

Alternatively, if you need both functions imported, you can use:

import { getLaundry, getTags } from '@/functions/blog'

Utilizing an asynchronous function in ES6 Vue.js and TypeScript

Answer №1

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