Function visit

lib/core/AxiosError.js:33–70

(source)

  const seen = [];

  const visit = (source) => {
    if (source === null || typeof source !== class="st">'object') return source;
    if (utils.isBuffer(source)) return source;
    if (seen.indexOf(source) !== -1) return undefined;

    if (source instanceof AxiosHeaders) {
      source = source.toJSON();
    }

    seen.push(source);

    let result;
    if (utils.isArray(source)) {
      result = [];
      source.forEach((v, i) => {
        const reducedValue = visit(v);
        if (!utils.isUndefined(reducedValue)) {
          result[i] = reducedValue;
        }
      });
    } else {
      if (!utils.isPlainObject(source) && hasOwnOrPrototypeToJSON(source)) {
        seen.pop();
        return source;
      }

      result = Object.create(null);
      for (const [key, value] of Object.entries(source)) {
        const reducedValue = lowerKeys.has(key.toLowerCase()) ? REDACTED : visit(value);
        if (!utils.isUndefined(reducedValue)) {
          result[key] = reducedValue;
        }
      }
    }

    seen.pop();
    return result;
  };

  return visit(config);
}