function formDataToJSON(formData) {
  function buildPath(path, value, target, index) {
    let name = path[index++];

    if (name === '__proto__') return true;

    const isNumericKey = Number.isFinite(+name);
    const isLast = index >= path.length;
    name = !name && utils$1.isArray(target) ? target.length : name;

    if (isLast) {
      if (utils$1.hasOwnProp(target, name)) {
        target[name] = [target[name], value];
      } else {
        target[name] = value;
      }

      return !isNumericKey;
    }

    if (!target[name] || !utils$1.isObject(target[name])) {
      target[name] = [];
    }

    const result = buildPath(path, value, target[name], index);

    if (result && utils$1.isArray(target[name])) {
      target[name] = arrayToObject(target[name]);
    }

    return !isNumericKey;
  }

  if (utils$1.isFormData(formData) && utils$1.isFunction(formData.entries)) {
    const obj = {};

    utils$1.forEachEntry(formData, (name, value) => {
      buildPath(parsePropPath(name), value, obj, 0);
    });

    return obj;
  }

  return null;
}
It takes a FormData object and returns a JavaScript object

@param {string} formData The FormData object to convert to JSON.

@returns {Object<string, any> | null} The converted object.