Allow FormData constructor to accept array or object too

[jimmywarting]

Like the URLSearchParams allow the FormData constructor able to accept a iterable array or object
instead of having to manually append everything

Current way of solving things:

var data = [ ['foo', 'bar'] ]
var data = { foo: 'bar' }

var fd = new FormData()

for (let [key, val] of new URLSearchParams(data)) {
  fd.append(key, val)
}

// or one-liner 
new URLSearchParams(data).forEach(args => fd.append(...args))

(this don't work for files/blobs)

Suggested way

var data = [ ['foo', 'bar'] ]
var data = { foo: 'bar' }

var fd = new FormData(data)

[travisleithead]

note var data = [ 'foo', 'bar' ]; might not work, it'd need to be var data = [ [ 'foo', 'bar'] ]; Otherwise this looks like a good idea.

[jimmywarting]

That is probably what i meant. updated my examples

[TheLarkInn]

@travisleithead Almost makes more sense to me to use Map() or Set() instead of plan Array or Object literals.

Another facet to consider.

[silverwind]

+1, this would be very nice to have. I'd definitely use the object form.