I am trying to use ESLint in WebStrom, but it doesn't work and displays an error:
ESLint: Parsing error: This experimental syntax requires enabling one of the following parser plugin(s): 'jsx, flow, typescript' (2:9).
Here is my .eslintrc
and package.json
settings. What should I do for fixing the error?
package.json
{
"name": "raonair-frontend",
"version": "0.1.0",
"private": true,
"dependencies": {
"@testing-library/jest-dom": "^5.11.4",
"@testing-library/react": "^11.1.0",
"@testing-library/user-event": "^12.1.10",
"eslint-config-react-app": "^6.0.0",
"react": "^17.0.2",
"react-dom": "^17.0.2",
"react-router-dom": "^5.2.0",
"react-scripts": "4.0.3",
"web-vitals": "^1.0.1"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject",
"prepare": "husky install"
},
"parser": "babel-eslint",
"eslintConfig": {
"extends": [
"react-app",
"airbnb",
"plugin:flowtype/recommended"
],
"plugins": [
"flowtype"
]
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
},
"devDependencies": {
"@babel/eslint-parser": "^7.15.0",
"@babel/eslint-plugin": "^7.14.5",
"@babel/plugin-syntax-jsx": "^7.14.5",
"eslint": "^7.32.0",
"eslint-config-airbnb": "^18.2.1",
"eslint-config-prettier": "^8.3.0",
"eslint-plugin-flowtype": "^5.9.0",
"eslint-plugin-import": "^2.23.4",
"eslint-plugin-jsx-a11y": "^6.4.1",
"eslint-plugin-react": "^7.24.0",
"eslint-plugin-react-hooks": "^4.2.0",
"husky": "^7.0.1",
"prettier": "^2.3.2"
}
}
.eslintrc
{
"env": {
"browser": true,
"node": true
},
"extends": [
"airbnb",
"airbnb/hooks",
"prettier"
],
"parser": "@babel/eslint-parser",
"parserOptions": {
"sourceType": "module",
"allowImportExportEveryWhere": false,
"ecmaFeatures": {
"globalReturn": false,
"jsx": true
},
"ecmaVersion": 2020,
"babelOptions": {
"configFile": "./babel.config.js"
}
},
"plugins": [
"jsx-a11y",
"react-hooks",
"@babel/",
"flowtype",
"import"
],
"rules": {
"import/no-anonymous-default-export": "off",
"import/no-extraneous-dependencies": "off",
"import/order": [
"error",
{
"groups": [
"builtin",
"external",
"internal",
"parent",
"sibling"
],
"newlines-between": "always",
"alphabetize": {
"order": "asc",
"caseInsensitive": false
}
}
],
"import/prefer-default-export": "off",
"indent": [
"error",
2,
{
"SwitchCase": 1
}
],
"jsx-a11y/anchor-is-valid": "off",
"no-console": "error",
"no-unused-vars": "error",
"react/jsx-props-no-spreading": "off",
"react/react-in-jsx-scope": "off"
},
"settings": {
"import/resolver": {
"typescript": {}
},
"insert_final_newline": true
}
}
To expand on Ceroy's answer (source):
yarn add @babel/preset-react -D
or
npm install --save-dev @babel/preset-react
.babelrc
file in the project root:
{
"presets": [
"@babel/preset-react"
]
}
.eslintrc.json
(so your console and VSCode will use the same one) - full eslintrc shown here:{
"parser": "@babel/eslint-parser",
"settings": {
"react": {
"version": "detect"
}
},
"env": {
"browser": true,
"es2021": true
},
"extends": [
"plugin:react/recommended",
"standard",
"plugin:react/jsx-runtime",
"plugin:testing-library/react",
"plugin:jest/all"
],
"parserOptions": {
"sourceType": "module"
},
"rules": {}
}
Note: .eslintrc.json
can also be created via npm init @eslint/config
or by using the ESLint extension in VSCode. The init will give you more options to choose from (such as TypeScript support)
Try it out in the console: npx eslint --fix .
Check VSCode (with the ESLint extension)
Bonus:
ESLint Plugin Settings for VSCode (autofix on save, Jest aware, babel parser etc. - in global VSCode settings.json):
...
"eslint.alwaysShowStatus": true,
"eslint.format.enable": true,
"eslint.lintTask.enable": true,
"eslint.options": {
"parser": "@babel/eslint-parser"
},
"editor.codeActionsOnSave": {
"source.fixAll.eslint": true
},
"eslint.validate": [
"javascript"
]
...
Full package.json
:
{
"name": "okta-test",
"version": "0.1.0",
"private": true,
"dependencies": {
"@testing-library/jest-dom": "^5.11.4",
"@testing-library/react": "^12.1.0",
"@testing-library/user-event": "^13.2.1",
"react": "^17.0.2",
"react-dom": "^17.0.2",
"react-router": "^5.2.1",
"react-router-dom": "^5.3.0",
"react-scripts": "4.0.3",
"web-vitals": "^2.1.0"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"eslintConfig": {
"extends": [
"react-app",
"react-app/jest"
]
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
},
"devDependencies": {
"@babel/eslint-parser": "^7.15.7",
"@babel/preset-react": "^7.14.5",
"eslint": "^7.32.0",
"eslint-config-standard": "^16.0.3",
"eslint-plugin-babel": "^5.3.1",
"eslint-plugin-import": "^2.24.2",
"eslint-plugin-jsx": "^0.1.0",
"eslint-plugin-node": "^11.1.0",
"eslint-plugin-promise": "^5.1.0",
"eslint-plugin-react": "^7.26.0"
}
}
Install @babel/preset-react
in dev dependencies.
Add this in .eslintrc file
... "parser": "@babel/eslint-parser", "parserOptions": { ... "babelOptions": { "presets": ["@babel/preset-react"] }, } ...
Source: https://ffan0811.medium.com/error-debugging-this-experimental-syntax-requires-enabling-one-of-the-following-parser-plugin-s-22946599a0a4
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