is-network-error

Check if a value is a Fetch network error

This can be useful when you want to do something specific when a network error happens without catching other Fetch-related errors.

Unfortunately, Fetch network errors are not standardized and differ among implementations. This package handles the differences.

For instance, p-retry uses this package to retry on network errors.

Install

1npm install is-network-error

Usage

1import isNetworkError from 'is-network-error';
2
3async function getUnicorns() {
4	try {
5		const response = await fetch('unicorns.json');
6		return await response.json();
7	} catch (error) {
8		if (isNetworkError(error)) {
9			return localStorage.getItem('…');
10		}
11
12		throw error;
13	}
14}
15
16console.log(await getUnicorns());

API

isNetworkError(value: unknown): boolean

Returns true if the given value is a Fetch network error, otherwise false.