ArrayFormat Type Comma is producing the output of Array Format Repeat when the array length is 1

qs.stringify({ a: ['b'] }, { arrayFormat: 'comma' }) should return the a=b.

But it is returning the repeat type format - a%5B%5D=b ~ a[]=b

Below is the documentation and expected behaviour from readme

qs.stringify({ a: ['b', 'c'] }, { arrayFormat: 'indices' })
// 'a[0]=b&a[1]=c'
qs.stringify({ a: ['b', 'c'] }, { arrayFormat: 'brackets' })
// 'a[]=b&a[]=c'
qs.stringify({ a: ['b', 'c'] }, { arrayFormat: 'repeat' })
// 'a=b&a=c'
qs.stringify({ a: ['b', 'c'] }, { arrayFormat: 'comma' })
// 'a=b,c'

Below is the screenshot for the same

Can anyone help me if this is an issue or Am I missing something?

[mima0815]

we run into the same issue with the new version.

not all APIs we are using are capable to handling query strings with brackets, they are expecting comma separated lists in all cases or no comma if it is only one value.

+1 for the additional option to toggle the “Arrayness” feature.

[manoj-rp]

I have read the thread. But Shouldn’t it be configurable?

Can we have another option along with arrayType.

preserveArrayness: true/false

Because there can be usecases like

One can use qs for stringifying it and may not be using it for parsing back again?

In our case,

We stringify it and pass the query string to an external service and that service doesn’t use the qs module to parse it back?

Any thoughts @ljharb