1- automatically add bearer tokens to requests rather than manually specifying them every single time
2- automatically dispatch some event or function when a 401 response is returned to clear the stale user session and return them to a login page.
There's no reason to repeat this logic in every single place you make an API call.
Likewise, every response I get is JSON. There's no reason to manually unwrap the response into JSON every time.
Finally, there's some nice mocking utilities for axios for unit testing different responses and error codes.
You're either going to copy/paste code everywhere, or you will write your own helper functions and never touch fetch directly. Axios... just works. No need to reinvent anything, and there's a ton of other handy features the GP mentioned as well you may or may not find yourself needing.
const myfetch = async (req, options) => {
let options = options || {};
options.headers = options.headers || {};
options.headers['Authorization'] = token;
let res = await fetch(new Request(req, options));
if (res.status == 401) {
// do your thing
throw new Error("oh no");
}
return res;
}
Because it is so few lines it is much more sensible to have everyone duplicate that little snippet manually than import a library and write interceptors for that...
(Not only because the integration with the library would likely be more lines of code, but also because a library is a significantly liability on several levels that must be justified by significant, not minor, recurring savings.)
Mine's about 100 LOC. There's a lot you can get wrong. Having a way to use a known working version and update that rather than adding a hundred potentially unnecessary lines of code is a good thing. https://github.com/mikemaccana/fetch-unfucked/blob/master/sr...
> import a library and write interceptors for that...
What you suggesting people would have to intercept? Just import a library you trust and use it.
- Don't waste time rewriting and maintaining code unecessarily. Install a package and use it.
- Have a minimum release age.
I do not know what the issue is.
fetch responses have a .json() method. It's literally the first example in MDN: https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/U...
It's literally easier than not using JSON because I have to think about if I want `repsponse.text()` or `response.body()`.
IMO interceptors are bad. they hide what might get transformed with the API call at the place it is being used.
> Likewise, every response I get is JSON. There's no reason to manually unwrap the response into JSON every time.
This is not true unless you are not interfacing with your own backends. even then why not just make a helper that unwraps as json by default but can be passed an arg to parse as something else