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lang-js
FormData. According to axios's doc, bothFileandFormDataare treated as Browser only, so both ways can be seen equally (github.com/axios/axios#request-config)data:formDataformData.getHeaders()This is a known issue with axios; see for e.g.https://github.com/axios/axios/issues/789Filevs.FormData: correct me if I'm wrong, but I believeFilecan be used only if you're uploading a single file and not including any other payload data in the request (like in the answer), butFormDatais what you'll have to use if you want to submit a collection of data (that is, a form with several fields) in addition to the file(s) (which I suspect is more often the case in real applications).