Determining fetch error type

[qwe3qwe3lott]

Good day!

I am using .fetchError chain to catch fetch errors. Into .fetchError`s callback I need to execute different functions based on different errors.

For example: (failed)net::ERR_INTERNET_DISCONNECTED => execute some fucntion CORS error => execute other function

But into .fetchError chain errors above return error with the same text - "TypeError: Failed to fetch"

Is there some way to determining such cases?

wretch version: 2.1.5

[elbywan]

Hey @qwe3qwe3lott 👋 ,

Is there some way to determining such cases?

This is not really related to wretch, and I'm not sure there is an easy way of doing this with the information contained in the error object itself.

The spec states that fetch can throw TypeError in a variety of cases and I guess that the data is mostly implementation dependendent.

Refs:

• https://fetch.spec.whatwg.org/#ref-for-exceptiondef-typeerror%E2%91%A2%E2%93%AA
• https://developer.mozilla.org/en-US/docs/Web/API/fetch#exceptions

[qwe3qwe3lott]

I'm not sure there is an easy way of doing this with the information contained in the error object itself

Unforturanly, it seems so(

Error object doesn`t contain reasons or details of error, so it is impossible to determine different cases.

Anyway, thanks for help!