Overview

When using the output from Drupal’s JSON:API in a separate application, a CORS error occurred. Here, I explain how to resolve the CORS error.

Solution

Copy the following file:

/web/sites/default/default.services.yml

Then, set enabled to true in cors.config:

As a result, the CORS error was resolved.

Summary

I hope this serves as a useful reference for anyone experiencing a similar issue.