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Description
I bumped eslint-config-xo from 0.46.0 to 0.47.0 and it broke it. My config is:
import { defineConfig, globalIgnores } from "eslint/config";
import eslintPlugin from "eslint-plugin-eslint-plugin";
import prettier from "eslint-config-prettier";
import xo from "eslint-config-xo";
import unicorn from "eslint-plugin-unicorn";
import n from "eslint-plugin-n";
export default defineConfig([
globalIgnores(["dist"]),
...xo,
eslintPlugin.configs["flat/recommended"],
unicorn.configs["flat/recommended"],
n.configs["flat/recommended"],
prettier,
{
rules: {
// Prefer fixing issues rather than adding exceptions here
"unicorn/prefer-module": "off",
"n/no-unpublished-require": "off", // Buggy
"n/no-unpublished-import": "off", // Buggy
"unicorn/no-null": "off",
"unicorn/prevent-abbreviations": [
"error",
{
replacements: {
args: false,
props: false,
i: false,
},
},
],
},
},
]);ESLint: 9.26.0
TypeError: Key "languageOptions": allowTrailingCommas option is only available in JSONC.
at new Config (~/node_modules/eslint/lib/config/config.js:207:10)
at [finalizeConfig] (~/node_modules/eslint/lib/config/flat-config-array.js:212:10)
at FlatConfigArray.getConfigWithStatus (~/node_modules/@eslint/config-array/dist/cjs/index.cjs:1263:55)
at FlatConfigArray.getConfig (~/node_modules/@eslint/config-array/dist/cjs/index.cjs:1281:15)
at entryFilter (~/node_modules/eslint/lib/eslint/eslint-helpers.js:288:27)
at async NodeHfs.<anonymous> (file://~/node_modules/@humanfs/core/src/hfs.js:574:24)
at async NodeHfs.walk (file://~/node_modules/@humanfs/core/src/hfs.js:614:3)
at async globSearch (~/node_modules/eslint/lib/eslint/eslint-helpers.js:329:20)
at async Promise.allSettled (index 0)
at async globMultiSearch (~/node_modules/eslint/lib/eslint/eslint-helpers.js:420:18)
If I add a console.log just before the throw new TypeError I can see that indeed allowTrailingCommas is set to true on the json/json language