Function toFormData

lib/helpers/toFormData.js:93–283

* It converts an object into a FormData object * * @param {Object<any, any>} obj - The object to convert to form data. * @param {string} formData - The FormData object to append to. * @param {Object<string, any>} options * * @returns

(obj, formData, options)

 * @returns
 */
function toFormData(obj, formData, options) {
  if (!utils.isObject(obj)) {
    throw new TypeError('target must be an object');
  }

  // eslint-disable-next-line no-param-reassign
  formData = formData || new (PlatformFormData || FormData)();

  // eslint-disable-next-line no-param-reassign
  options = utils.toFlatObject(
    options,
    {
      metaTokens: true,
      dots: false,
      indexes: false,
    },
    false,
    function defined(option, source) {
      // eslint-disable-next-line no-eq-null,eqeqeq
      return !utils.isUndefined(source[option]);
    }
  );

  const metaTokens = options.metaTokens;
  // eslint-disable-next-line no-use-before-define
  const visitor = options.visitor || defaultVisitor;
  const dots = options.dots;
  const indexes = options.indexes;
  const _Blob = options.Blob || (typeof Blob !== 'undefined' && Blob);
  const maxDepth = options.maxDepth === undefined ? DEFAULT_FORM_DATA_MAX_DEPTH : options.maxDepth;
  const useBlob = _Blob && utils.isSpecCompliantForm(formData);
  const stack = [];

  if (!utils.isFunction(visitor)) {
    throw new TypeError('visitor must be a function');
  }

  function convertValue(value) {
    if (value === null) return '';

    if (utils.isDate(value)) {
      return value.toISOString();
    }

    if (utils.isBoolean(value)) {
      return value.toString();
    }

    if (!useBlob && utils.isBlob(value)) {
      throw new AxiosError('Blob is not supported. Use a Buffer instead.');
    }

    if (utils.isArrayBuffer(value) || utils.isTypedArray(value)) {
      if (useBlob && typeof _Blob === 'function') {
        return new _Blob([value]);
      }
      if (typeof Buffer !== 'undefined') {
        return Buffer.from(value);