Uncaught (in promise) TypeError: X is not a function

Question

I'm trying to build a vue app that searches through Spotify's API to find tracks. But I have a question, it says:

Uncaught (in promise) TypeError: searchTracks is not a function

Whenever I call the searchTracks function. I searched for a solution but can't seem to find one. I have the code to access the Spotify API on a different file (useSpotify.js) (I'm still learning)

import { ref } from 'vue'

const useSpotify = async () => {
    let token
    const id = 'MyId'
    const secretId = 'mySecretId'

    const res = await fetch('https://accounts.spotify.com/api/token', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/x-www-form-urlencoded',
            'Authorization': 'Basic ' + btoa(id + ':' + secretId)
        },
        body: 'grant_type=client_credentials'
    });

    token = await res.json();
    console.log(token);

    const searchTracks = async (searchTerm) => {
        console.log(token)
        const res = await fetch(`https://api.spotify.com/v1/search?${searchTerm}&type=track`, {
            method: 'GET',
            headers: { 'Authorization': 'Bearer ' + token }
        });
        const data = ref(null)
        data.value = await res.json()
        console.log(data.value)

        return data.value
    }

    return { searchTracks }
}

export default useSpotify

I'm calling this in a vue component just to try it out (Login.vue) You can go to //searchTry to see the code this attempt is done

<template>
  <form @submit.prevent="handleLoginSubmit">
    <h3>Login</h3>
    <input type="email" placeholder="Email" v-model="email" />
    <input type="password" placeholder="Password" v-model="password" />
    <div class="error" v-if="error">{{error}}</div>
    <button v-if="!isPending">Login</button>
    <button v-if="isPending" disabled>Loading..</button>
  </form>
  <input type="text" v-model="searchTerm">
  <button @click="search">search</button>
</template>

<script>
import useLogin from "@/composables/useLogin";
import { ref } from '@vue/reactivity';
import { useRouter } from 'vue-router';
// searchTry
import useSpotify from '../../composables/spotifyApi/useSpotify'
// searchTry
export default {
  setup() {
    const {error, isPending, login} = useLogin()
    const router = useRouter()

    const email = ref('')
    const password = ref('')

    const handleLoginSubmit = async () =>{
      const res = await login(email.value, password.value)
      if(!error.value){
        router.push({name: 'UserPlaylists'})
      }
    }
    // search try
    const searchTerm = ref('')
    const {searchTracks} = useSpotify()
    const search = async () =>{
      const res = searchTracks(searchTerm.value)
    }
    // search try

    return{email, password, isPending, error, handleLoginSubmit, searchTerm, search}
  },
};
</script>

<style>

I don't understand where the problem comes from. Please help (I'm still not very good at JavaScript, please point out the mistakes I'm making)

Answer 1

You define useSpotify as an async function, which should be called using await or then(). The response of an async function is always a promise. document

useSpotify().then((result) => {
        const {searchTracks} = result
        // rest of your code
    })