Should handle querystrings in case-insensitive manner about query-string HOT 3 CLOSED

I'll disagree with your disagreement. That no other implementations don't do it is a poor argument. This could be made part of the options object passed to the parse function. If you don't want it to be the default, fine but it should be an options. It's obvious that querystring parameters are not case sensitive and any querystring parser should handle them as such.

Anyway, I've change my local version to this

return Object.keys(ret).sort().reduce(function (result, key) {
    var val = ret[key];

    //Lowercase the key
    key = key.toLowerCase();

    if (Boolean(val) && typeof val === 'object' && !Array.isArray(val)) {
        // Sort object keys, not values
        result[key] = keysSorter(val);
    } else {
        result[key] = val;
    }

    return result;
}, Object.create(null));

from query-string.

I disagree and none of the other querystring implementations do this either.

I want to follow URLSearchParams as much as possible:

x = new URLSearchParams('FOO=1&foo=2');
console.log(Array.from(x.keys()));
//=> ["FOO", "foo"]

from query-string.

You never know if a user or some other system is going to provide a querystring parameter in the same case that you expect.

https://github.com/sindresorhus/lowercase-keys

from query-string.