qs-primitives-decoder.js

export const qsPrimitivesDecoder = (value, defaultDecoder, charset, type) =>
  (type === "key" ? defaultDecoder : convertFromString)(value);

function convertFromString(value) {
  if (typeof value === "undefined" || value === "") {
    return null;
  } else if (value === "false" || value === "true") {
    return value === "true";
  } else if (Array.isArray(value)) {
    return value.map(convertFromString);
  } else if (value.constructor === Object) {
    return Object.keys(value).reduce((result, key) => {
      result[key] = convertFromString(value[key]);
      return result;
    }, {});
  } else if (!isNaN(parseFloat(value)) && isFinite(value)) {
    return Number(value);
  }
  return value;
}

const queryParams = qs.parse(location.search, { decoder: qsPrimitivesDecoder });