@lytejs/query-string/es/index.js

A Query String Parser that actually works

var stringify = function stringify(params) {
  return Object.keys(params).map(function (k) {
    var current = params[k];
    if (current === undefined) return k + "=";

    if (Array.isArray(current)) {
      if (current.length === 0) return k + "=";
      return current.map(function (param) {
        return k + "[]=" + encodeURIComponent(typeof param === 'object' ? JSON.stringify(param) : param);
      }).join('&');
    }

    return k + "=" + encodeURIComponent(typeof current === 'object' ? JSON.stringify(current) : current);
  }).join('&');
};
var parse = function parse(query) {
  if (query === void 0) {
    query = '';
  }

  var trimQuery = query.replace(/^\?/, '');
  var queries = trimQuery.split('&').map(function (query) {
    return query.split('=');
  });
  var initial = {};
  if (!trimQuery) return initial;
  return queries.reduce(function (acc, query) {
    if (!query[1] || !query[0]) return acc;
    var decoded = decodeURIComponent(query[1]);
    var finalValue = decoded;

    if (decoded[0] === '{' || decoded[0] === '[') {
      try {
        finalValue = JSON.parse(decoded);
      } catch (e) {}
    }

    if (query[0].endsWith('[]')) {
      var _key = query[0].slice(0, -2);

      acc[_key] = acc[_key] || [];

      acc[_key].push(finalValue);
    } else acc[query[0]] = finalValue;

    return acc;
  }, initial);
};

export { parse, stringify };
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