'Unable to catch Network Error when sending request using Inertia + Vue

While sending a this.$inertia.patch request I'm unable to catch a Network Error. I'm turning off the backend server to emulate a lost connection. The console shows: Uncaught (in promise) Error: Network Error.

I've tried Inertia's onError, tried adding a .catch after the request as well as a separate try...catch and used the Vue 2's

errorCaptured: function(err) {
   console.log('Caught error', err.message)
},

I can give more details if needed.

So basically trying to catch net::ERR_CONNECTION_REFUSED

Edit: I moved to using onFinish along with onSuccess and onStart, but finally used axios

Solution 1:^[1]

Use onStart along with onSuccess and onFinish:

In the case of a network error, onFinish will trigger without onSuccess.
In the case of a server error onError will trigger with onFinish

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'Unable to catch Network Error when sending request using Inertia + Vue

Solution 1:[1]

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Solution 1:^[1]