How to fix eslint configuration? - node.js

Question

I have node.js project, and started with eslint configuration.
There is .eslintrc.json
{
"parser": "babel-eslint",
"extends": [
"airbnb",
"plugin:node/recommended",
"plugin:security/recommended",
"prettier",
],
"env": {
"node":true,
"commonjs": true,
"es6": true,
},
"globals": {
"Atomics": "readonly",
"SharedArrayBuffer": "readonly"
},
"plugins": [
"prettier"
],
"rules": {
"prettier/prettier": "error",
"node/exports-style": ["error", "module.exports"],
"node/file-extension-in-import": ["error", "always"],
"node/prefer-global/buffer": ["error", "always"],
"node/prefer-global/console": ["error", "always"],
"node/prefer-global/process": ["error", "always"],
"node/prefer-global/url-search-params": ["error", "always"],
"node/prefer-global/url": ["error", "always"],
"node/prefer-promises/dns": "error",
"node/prefer-promises/fs": "error",
},
}
And package.json
{
"name": "server",
"version": "1.0.0",
"description": "",
"main": "server.js",
"license": "ISC",
"lint-staged": {
"*.{js,jsx}": [
"eslint --fix",
"git add"
],
"*.scss": [
"stylelint --fix",
"git add"
]
},
"scripts": {
"development": "nodemon",
"test": "echo \"Error: no test specified\" && exit 1",
"start": "babel-node server.js",
"eslint": "eslint config '**/*.js' --ext .js",
"prettier": "prettier '**/*.js' --write",
"stylelint": "stylelint '**/*.js'"
},
"author": "",
"dependencies": {
"#babel/polyfill": "^7.6.0",
"body-parser": "^1.19.0",
"cookie-parser": "^1.4.4",
"cors": "^2.8.5",
"express": "^4.17.1",
"helmet": "^3.21.0",
"history": "^4.9.0",
"mongoose": "^5.6.13",
"nodemon": "^1.19.2"
},
"devDependencies": {
"#babel/cli": "^7.6.4",
"#babel/core": "^7.6.0",
"#babel/node": "^7.6.3",
"#babel/plugin-proposal-class-properties": "7.3.3",
"#babel/plugin-proposal-json-strings": "7.2.0",
"#babel/plugin-syntax-dynamic-import": "^7.2.0",
"#babel/plugin-syntax-import-meta": "7.2.0",
"#babel/preset-env": "^7.3.1",
"#commitlint/cli": "^7.5.2",
"#commitlint/config-conventional": "^7.5.0",
"autoprefixer": "^9.4.7",
"babel-eslint": "^10.0.3",
"babel-loader": "^8.0.6",
"babel-preset-env": "^1.7.0",
"cross-env": "^5.2.0",
"eslint": "^6.4.0",
"eslint-config-airbnb": "^18.0.1",
"eslint-config-prettier": "^6.3.0",
"eslint-plugin-import": "^2.18.2",
"eslint-plugin-prettier": "^3.1.0",
"husky": "^1.3.1",
"lint-staged": "^8.1.4",
"prettier": "^1.18.2",
"rimraf": "^2.6.3",
"stylelint": "^10.1.0",
"stylelint-config-standard": "^18.3.0",
"stylelint-order": "^3.1.0"
}
}
When I try to write yarn run eslint from directory root I have an error :
$ yarn run eslint
yarn run v1.17.3
warning ../package.json: No license field
$ eslint config '**/*.js' --ext .js
Oops! Something went wrong! :(
ESLint: 6.4.0.
Failed to read JSON file at
/Users/vladyslavsymonenko/Chess/server/.eslintrc.json:
Cannot read config file: >/Users/vladyslavsymonenko/Chess/server/.eslintrc.json
Error: Unexpected token ] in JSON at position 1040
error Command failed with exit code 2.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about >this command.
I'm really confused with results, please help me )

Answer 1

You need to remove all trailing commas (like "prettier", on line 7) from your .eslintrc, since it is not valid JSON:
{
"parser": "babel-eslint",
"extends": [
"airbnb",
"plugin:node/recommended",
"plugin:security/recommended",
"prettier"
],
"env": {
"node": true,
"commonjs": true,
"es6": true
},
"globals": {
"Atomics": "readonly",
"SharedArrayBuffer": "readonly"
},
"plugins": [
"prettier"
],
"rules": {
"prettier/prettier": "error",
"node/exports-style": ["error", "module.exports"],
"node/file-extension-in-import": ["error", "always"],
"node/prefer-global/buffer": ["error", "always"],
"node/prefer-global/console": ["error", "always"],
"node/prefer-global/process": ["error", "always"],
"node/prefer-global/url-search-params": ["error", "always"],
"node/prefer-global/url": ["error", "always"],
"node/prefer-promises/dns": "error",
"node/prefer-promises/fs": "error"
}
}