stringify with arrayFormat: 'brackets' doesn't urlEncode the square brackets

[ioev]

It seems keys generated from arrays with arrayFormat: 'bracket' don't get urlEncoded:

stringify({ a: [1, 2, 3 ]}, { arrayFormat: 'bracket' }); => a[]=1&a[]=2&a[]=3

[sindresorhus]

Why would they be?

[ioev]

From what I understood, they are not supposed to be in the URI unencoded?
https://newbedev.com/is-array-syntax-using-square-brackets-in-url-query-strings-valid

"This is why, for example, it is not a violation of RFC 3986 when PHP accepts both unencoded and percent encoded square brackets as valid characters in a query string, and even assigns to them a special purpose. However, it would appear that authors who try to take advantage of this loophole by not percent encoding square brackets are in violation of RFC 3986."

[sootood]

i had same issue so use qs package and it works

[Reeywhaar]

Stringifying query parameter which includes brackets gives inconsistent result which mixes encoded and unencoded, so at least it better be consistent at least

const q = qs.stringify({ 'filter[product]': 'test', 'filter[id]': [1, 2, 3] }, { arrayFormat: 'bracket' })
console.log(q) //  filter%5Bid%5D[]=1&filter%5Bid%5D[]=2&filter%5Bid%5D[]=3&filter%5Bproduct%5D=test