<!-- Click "Preview" for a more readable version -- Please read and follow the instructions before submitting an issue: - Read all our documentation, especially the [README](https://github.com/axios/axios/blob/master/README.md). It may contain information that helps you solve your issue. - Ensure your issue isn't already [reported](https://github.com/axios/axios/issues?utf8=%E2%9C%93&q=is%3Aissue). - If you aren't sure that the issue is caused by Axios or you just need help, please use [Stack Overflow](https://stackoverflow.com/questions/tagged/axios) or [our chat](https://gitter.im/mzabriskie/axios). - If you're reporting a bug, ensure it isn't already fixed in the latest Axios version. - Don't remove any title of the issue template, or it will be treated as invalid by the bot. ⚠️👆 Feel free to these instructions before submitting the issue 👆⚠️ --> #### Describe the bug [`Cancel`](https://github.com/axios/axios/blob/master/index.d.ts#L101-L103) signature does not consider that the message [could be undefined](https://github.com/axios/axios/blob/master/index.d.ts#L98).
Describe the bug
Cancelsignature does not consider that the message could be undefined.