You can configure how to format arrays in the query strings.
Note: when using arrayFormat set to 'comma', you can also pass the commaRoundTrip option set to true or false, to append  on single-item arrays, so that they can round trip through a parse. (Allowed values: indices, brackets, repeat, comma)
Even if there is a single item in an array, this option treats them as arrays (default: false)
When arrays are stringified, by default they are not given explicit indices:
You may override this by setting the indices option to true: