Why is response.data.constructor !== Object

[LucidityDesign]

anyobject.constructor === Object is a popular method to check if a variable is an object (e.g. see here: https://stackoverflow.com/a/16608074/1301058)

For the server-side response data from $axios.get this doesn't work because response.data.constructor === Object returns false.

Steps to reproduce:

1. git clone git@github.com:LucidityDesign/axios-module.git
2. yarn install
3. yarn dev
4. open localhost:3000/ssr
5. console logs response type false
6. see https://github.com/LucidityDesign/axios-module/blob/main/test/fixture/pages/ssr.vue#L17

Expected behaviour:

response.data.constructor === Object
// => true

[LucidityDesign]

So I tried to debug this phenomenon:
After axios is transforming the response response.data.constructor === Object is true.
Due to the resolving of promises I lose track of the variable, but as soon as they appear in this module (e.g. here) response.data.constructor === Object is false.