posting data with Axios

Try this one also and replace

baseURL

import axios from 'axios'

let var1 = 'firstName'
let value1 = 'Fred'
let var2 = 'lastName'
let value2 = 'Flinstone'

const api = axios.create({baseURL: 'http://example.com'})
api.post('/user/12345', {
    var1: value1,
    var2: value2
})
.then(res => {
     console.log(res)
})
.catch(error => {
     console.log(error)
})

Try this it works for me

const obj = {
  firstName: Fred,
  lastName: Flinstone
}
axios
  .post(
    "url",
    this.obj,
  )
  .then(response => {
    console.log(response)
  })
  .catch(error => {
    console.log(error);
  });

You can create your own object and pass it to your data request like this:

var obj = {
  [myKey]: value,
}

or 

var obj = {};
obj['name'] = value;
obj['anotherName'] = anotherValue;

Creating object with dynamic keys

Dynamically Add Variable Name Value Pairs to JSON Object

edited: how to post request

const profile = {};
//...fill your object like this for example
profile[key] = value;

axios.post('profile/student', profile)
  .then(res => {
    return res;
  });