Extending eslint-plugin-svelte/recommended throws a Converting circular structure to JSON error
Using "extends": "plugin:eslint-plugin-svelte/recommended" with [email protected] throws a Converting circular structure to JSON error. Perhaps something related to legacy vs flat config?
Steps to reproduce
Create a new blank SvelteKit app and answer the prompts as shown:
npx sv create app
┌ Welcome to the Svelte CLI! (v0.6.10)
│
â—‡ Which template would you like?
│ SvelteKit minimal
│
â—‡ Add type checking with Typescript?
│ No
│
â—† Project created
│
â—‡ What would you like to add to your project? (use arrow keys / space bar)
│ none
│
â—‡ Which package manager do you want to install dependencies with?
│ npmNow add xo:
cd app
npm install xo --save-dev
npm init xo
npx xo # Runs successfully, and reports 9 lint errorsSo far so good, but we aren’t linting Svelte files yet. Let’s add eslint-plugin-svelte@next (the @next is for Svelte 5 support) and configure xo to use it:
npm install --save-dev eslint-plugin-svelte@next
touch .xo-config.jsonEdit the newly created .xo-config.json to include the following, adapted from https://github.com/sveltejs/eslint-plugin-svelte#configuration:
{
"extensions": ["svelte"],
"plugins": ["svelte"],
"overrides": [
{
"files": "**/*.svelte",
"extends": "plugin:eslint-plugin-svelte/recommended",
"processor": "svelte/svelte",
"envs": ["browser"]
}
]
}Now npx xo returns:
/private/tmp/app/node_modules/eslint/node_modules/@eslint/eslintrc/dist/eslintrc.cjs:2156
const formattedValue = JSON.stringify(error.data);
^
TypeError: Converting circular structure to JSON
--> starting at object with constructor 'Object'
| property 'plugins' -> object with constructor 'Object'
| property 'svelte' -> object with constructor 'Module'
| ...
| property 'base' -> object with constructor 'Array'
--- index 0 closes the circle
Referenced from: BaseConfigRemoving the "extends": "plugin:eslint-plugin-svelte/recommended" line makes the error go away, but linting of Svelte files breaks.
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