Uncaught (in promise) TypeError: Cannot read property 'protocol' of undefined

Question

I'm trying to post some data to a fake API which in this case is jsonPlaceHolder and the idea is that the user can enter a title and content and post it to this API at https://jsonplaceholder.typicode.com/posts using axios by pressing a button but i keep getting the error in the title of this question.

here is the code:

<template>
  <div>
    <h1>it 2020 people</h1>
    <p>type in your title</p>
    <input type="text" v-model="title" />

    <p>type your content</p>
    <textarea cols="30" rows="1" v-model="body"></textarea>

    <h3>your title is {{ title }}</h3>
    <h3>your content is {{ body }}</h3>

    <button v-on:click="post()">post</button>
  </div>
</template>

<script>
import Vue from "vue";
import Axios from "axios";

Vue.use(Axios);
export default {
  components: {},
  data() {
    return {
      title: "",
      body: "",
    };
  },
  methods: {
    post: function () {
      Vue.axios
        .post("https://jsonplaceholder.typicode.com/posts", {
          title: this.title,
          body: this.body,
          userid: 1,
        })
        .then(function (data) {
          return console.log(data);
        });
    },
  },
};

and this is the error that appears before running anything:

Uncaught (in promise) TypeError: Cannot read property 'protocol' of undefined
    at isURLSameOrigin (isURLSameOrigin.js?3934:57)
    at dispatchXhrRequest (xhr.js?b50d:115)
    at new Promise (<anonymous>)
    at xhrAdapter (xhr.js?b50d:13)
    at dispatchRequest (dispatchRequest.js?5270:52)
isURLSameOrigin @ isURLSameOrigin.js?3934:57
dispatchXhrRequest @ xhr.js?b50d:115
xhrAdapter @ xhr.js?b50d:13
dispatchRequest @ dispatchRequest.js?5270:52

and this is the error i get after pressing the button that is supposed to send the data to the API:

[Vue warn]: Error in v-on handler: "TypeError: vue__WEBPACK_IMPORTED_MODULE_0__.default.axios is not a function"

found in

---> <App> at src/App.vue
       <Root>
warn @ vue.runtime.esm.js?2b0e:619
logError @ vue.runtime.esm.js?2b0e:1884
globalHandleError @ vue.runtime.esm.js?2b0e:1879
handleError @ vue.runtime.esm.js?2b0e:1839
invokeWithErrorHandling @ vue.runtime.esm.js?2b0e:1862
invoker @ vue.runtime.esm.js?2b0e:2179
original._wrapper @ vue.runtime.esm.js?2b0e:6917

I really don't have any clue what is the problem, any helpful information is much appreciated. thanks in advance.

Vue.use(Axios); 👈 Axios is not a Vue plugin so you cannot use it like this. If you've imported Axios as axios, just use axios.post() — Phil
Does this answer your question? axios is not defined in vue js cli — Phil
Hmmm I guess you use wrong please check this link github.com/axios/axios/issues/632 — Anhdevit
@Phil unfortunately every time i use axios.post() it says axios is not defined — Milad

Nadir Abbas Nadir Abbas · Accepted Answer · 2020-10-07T04:11:54

axios is not a Vue plugin so you cannot use axios like that. Instead, you can create an api service module like this:

//apis.js
import axios from 'axios'

const api  = axios.create({
  baseURL: 'api.domain.com',
  headers: {
    'Content-Type': 'application/json'
  }
})

export default api

and then in the file where you want to make the request

import api from './services/api'
export default {
  methods: {
    async makeRequest() {
      try {
        const res = await api.get('/endpoint')
        console.log(res)  
      } catch (error) {
        console.error(error)
      }
    }
  }
}

Uncaught (in promise) TypeError: Cannot read property 'protocol' of undefined

1 Answers