Support for FormData

[cloudsere]

Hi, does o.js plan to support FormData

I noticed that there're code in OHandler.ts which do a JSON.stringify on request body, which is not needed if the request body is FormData.

o.js/src/OHandler.ts

Line 236 in ef5d27e

return JSON.stringify(body);

[janhommes]

but it's only doing it if the type is object... otherwise, it is returning the body. So it should be already supported, or do you face any issues? Maybe the type check is not correct :/

https://stackoverflow.com/questions/46146637/detect-if-javascript-object-is-a-formdata-instance

maybe we need to use instanceof?