Converts a query string into a key-value array/object. Does not support nested objects (e.g. `?foo[bar]=foobar` becomes `{ 'foo[bar]': 'foobar' }`).

shallowQueryStringSerializer.js

function qsShallowObject(qs) {
    var string = qs.indexOf('?') == 0 ? qs.slice(1) : qs.slice();
    return (string.split('&')
        .map(function (qsEl) {
            return qsEl.split('=').map(decodeURIComponent);
        })
        .reduce(function (query, keyValue) {
            query[keyValue[0]] = keyValue[1];
            return query;
        }, {})
    );
}