Function serialize

test/angular/1.7/angular.js:11986–12005

(toSerialize, prefix, topLevel)

      return parts.join('&');

      function serialize(toSerialize, prefix, topLevel) {
        if (isArray(toSerialize)) {
          forEach(toSerialize, function(value, index) {
            serialize(value, prefix + '[' + (isObject(value) ? index : '') + ']');
          });
        } else if (isObject(toSerialize) && !isDate(toSerialize)) {
          forEachSorted(toSerialize, function(value, key) {
            serialize(value, prefix +
                (topLevel ? '' : '[') +
                key +
                (topLevel ? '' : ']'));
          });
        } else {
          if (isFunction(toSerialize)) {
            toSerialize = toSerialize();
          }
          parts.push(encodeUriQuery(prefix) + '=' +
              (toSerialize == null ? '' : encodeUriQuery(serializeValue(toSerialize))));
        }
      }
    };
  };
}