Hey, thanks for the PR. Do you mind to elaborate on the use case?

Coverage increased (+0.02%) to 97.949% when pulling 67b8a8e on m59peacemaker:master into 03444d2 on form-data:master.

I'm not sure about a specification about this, but every object in JavaScript that is a native type has its own matching toString() result.

new Map().toString() // => '[object Map]'
[].toString() // => '[object Array]'
new Request({}) // =>'[object Request]'

and so on. Any environment where FormData is natively available, new FormData().toString() will behave in accordance with my PR. I noticed it in a case where I wanted to see if an object was an instance of FormData without having to require the actual object. instanceof has a history of being unreliable anyway, and I'm not sure if those issues have been resolved.

I found the spec. http://www.ecma-international.org/publications/files/ECMA-ST-ARCH/ECMA-262,%201st%20edition,%20June%201997.pdf Section: 15.2.4.2

15.2.4.2 Object.prototype.toString()
When the toString method is called, the following steps are taken:

1. Get the [[Class]] property of this object.
2. Call ToString(Result(1)).
3. Compute a string value by concatenating the three strings "[object ", Result(2), and "]".
4. Return Result(3).

I see. To make it more like the real thing, makes sense. Thanks a lot.
Merging and after all CI stuff is done will publish patch version.

Fantastic. Thanks! It's a good thing for any object that acts as a special type in JavaScript, even if it isn't native such as this case. For example, I was just logging some Immutable.js types and they have their own toString(). https://github.com/facebook/immutable-js/blob/c93bb75ef238371bf3003337c905b1eb31bc2045/src/List.js#L67-L69

Yeah, I prefer that kind of more meaningful toStrings, maybe something like urlencoded parameters, although it'd be hard to support all kinds of values. And we need to follow native thing anyway.

Published 2.1.4. Thank you.