The custom query string serializer could be used to specify how the query strings are serialized to a string before sending it in the request. For example:

import { stringify } from 'qs'
import { ApiRequest } from '@japa/api-client'

ApiRequest.setQsSerializer((value) => stringify(value))

test('send arrays in query string', ({ client }) => {
  await client
    .get('/')
    .qs('ids', ['1']) // send as Array
    .qs('usernames[]', 'virk') // send using array brackets in the key name
})

3.1.0 (2025-05-06)

Bug Fixes

• normalize header name in assertHeader & assertHeaderMissing (#15) (6fd8c08)

Features

• add support for specifying a custom query string serializer (1dc2334), closes #13

What's Changed

• fix: normalize header name in assertHeader & assertHeaderMissing by @Vahelnir in #15

New Contributors

• @Vahelnir made their first contribution in #15

Full Changelog: v3.0.4...v3.1.0