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Requires using native `fetch` which Next.js provides, removing the need for third-party fetch libraries.
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Conformance is available on Enterprise plans

This rule is available from version 1.1.0.

Next.js extends the native Web fetch API with additional caching capabilities which means third-party fetch libraries are not needed. Including these libraries in your app can increase bundle size and negatively impact performance.

This rule will detect any usage of the following third-party fetch libraries:

  • isomorphic-fetch
  • whatwg-fetch
  • node-fetch
  • cross-fetch
  • axios

If there are more libraries you would like to restrict, consider using a custom rule.

By default, this rule is disabled. You can enable it by customizing Conformance.

For further reading, see:

This rule will catch the following code.

import fetch from 'isomorphic-fetch';
export async function getAuth() {
  const auth = await fetch('/api/auth');
  return auth.json();

Replace the third-party fetch library with the native fetch API Next.js provides.

Last updated on June 19, 2024