How to send json parameter and multipart/form-data file in one request with vue, just as postman does?
[![postman request](https://i.stack.imgur.com/CMi3D.png)](https://i.stack.imgur.com/CMi3D.png)

I've searched [how to submit "multipart/form-data" from VueJs](https://stackoverflow.com/questions/43574869/how-to-submit-multipart-form-data-from-vuejs) . What I want is image file in multipart format, and other parameters in one json object(content-type is json). All the parameters are sent as a single http request.

The main difference is how to send json parameters and multipart file in a single http post request?