How to correctly use axios params with arrays

You can use paramsSerializer and serialize parameters with https://www.npmjs.com/package/qs

axios.get('/myController/myAction', {
  params: {
    storeIds: [1,2,3]
  },
  paramsSerializer: params => {
    return qs.stringify(params)
  }
})

Without having to add more libraries and using ES6 you could write:

axios.get(`/myController/myAction?${[1,2,3].map((n, index) => `storeIds[${index}]=${n}`).join('&')}`);