Trying to run react app using npm run react-start but get this error while starting the development server.
failed to load plugin 'babel' declared in '.eslintrc': cannot find module 'eslint-plugin-babel' require stack: - c:\users\user\appdata\roaming\npm\node_modules\react-scripts\config_placeholder_.js
Here is my .eslintrc config file data:
{
"parser": "babel-eslint",
"env": {
"browser": true,
"es6": true
},
"extends": ["plugin:react/recommended", "prettier"],
"globals": {
"Atomics": "readonly",
"SharedArrayBuffer": "readonly",
"window": true
},
"parserOptions": {
"ecmaFeatures": {
"jsx": true
},
"ecmaVersion": 2018,
"sourceType": "module"
},
"plugins": [
"react",
"babel",
"jsx",
"prettier"
],
I already installed eslint-plugin-babel using this command npm add -D eslint-plugin-babel.
version details :
npm -v : 6.14.8,
node -v: v14.15.0,
babel-eslint": "^10.1.0",
eslint-plugin-babel": "^5.3.1"
Related
recently in project that I'm starting from scratch I met a problem that I can't get quite solved. I'm not an expert in pnp, actually was setting up this for the first time just now.
We decided to use yarn#berry with zero-installs setup, I did also setup an eslint, prettier, husky with commitlint and started the app.
So, after any .tsx file save this error comes up:eslint plugin error
Here is my .eslintrc.json
{
"env": {
"browser": true,
"es2021": true,
"jest": true
},
"extends": [
"react-app",
"react-app/jest",
"airbnb",
"airbnb-typescript",
"plugin:import/typescript"
],
"parser": "#typescript-eslint/parser",
"parserOptions": {
"ecmaFeatures": {
"jsx": true
},
"ecmaVersion": "latest",
"sourceType": "module",
"project": "./tsconfig.json"
},
"plugins": ["react", "#typescript-eslint"],
"rules": {
"react/react-in-jsx-scope": ["off"],
"react/jsx-uses-react": ["off"],
"react/no-array-index-key": ["off"],
"react/jsx-props-no-spreading": ["warn"],
"react/no-unescaped-entities": ["off"],
"react/function-component-definition": [
2,
{
"namedComponents": "arrow-function",
"unnamedComponents": "arrow-function"
}
]
}
}
And when I do install this single library manually it starts to ask for next plugin that ESlint extends from.
How I can get a warning instead of an error while using ESLint?
I use ESLint 6.7.2 version with a plugin for babel and react.
This is my actual .eslintrc.json:
{
"env": {
"browser": true,
"es6": true
},
"extends": [
"eslint:recommended",
"plugin:react/recommended"
],
"globals": {
"Atomics": "readonly",
"SharedArrayBuffer": "readonly"
},
"parserOptions": {
"ecmaFeatures": {
"jsx": true
},
"ecmaVersion": 2018,
"sourceType": "module"
},
"plugins": [
"react"
],
"rules": {
},
"settings": {
"react" : {
"version": "16.7.0"
}
},
"parser": "babel-eslint"
}
I've found the answer:
It enough to add a rule for no-unused-vars:
"rules": {
"no-unused-vars": "warn"
},
Also, restart the server.
I have defined an arrow function on my node 12.6.0 application. But when running eslint it reports an error about Parsing error: Unexpected token =. It works if I add "parser": "babel-eslint" on eslint configuration file. I wonder why eslint require babel for that. This syntax is already supported by node 12.6.0.
Below is my eslint configuration file:
{
"env": {
"commonjs": true,
"es6": true,
"node": true,
"jest": true
},
"extends": [
"airbnb-base"
],
"globals": {
"Atomics": "readonly",
"SharedArrayBuffer": "readonly"
},
"parserOptions": {
"ecmaVersion": 2018
},
"rules": {
},
"parser": "babel-eslint"
}
I'm very confused about how to setup the config file and which configs/plugins I should use.
I have a React project that uses Typescript, Jest and React hooks.
I know I need to install:
eslint
prettier, eslint-config-prettier, eslint-plugin-prettier
eslint-plugin-import
As for the Airbnb config, I'm not sure whether I need to install:
eslint-config-airbnb, eslint-plugin-react, eslint-plugin-jsx-a11y
or
eslint-config-airbnb-base
It doesn't seem like either of these support Typescript, so it seems I also need to install:
#typescript-eslint/eslint-plugin, #typescript-eslint/parser
And for Jest, I need to install:
eslint-plugin-jest
I'm not sure about React hooks. Do I need to install anything additional here or do one of the other packages include support for it? I see I have the option of installing:
eslint-plugin-react-hooks
Is that required?
Now, for the config file there are two areas I'm concerned with: extends and plugins.
I see that a few of these packages can be extended with /recommended. Should I use any of these? What should the extends section be? I've seen examples where it sets it as:
{
"extends": ["airbnb-base", "plugin:prettier/recommended"]
}
While I've seen other examples that use:
{
"extends": ["airbnb", "prettier"]
}
And another example that uses:
{
"extends": [
"airbnb",
"plugin:prettier/recommended",
"prettier/react"
]
}
What about the other Typescript, Jest and React Hooks plugins? For example, eslint-plugin-jest suggests adding "plugin:jest/recommended" to the extends. Will that conflict with any of the others? I see I could also add "plugin:#typescript-eslint/recommended" and "prettier/#typescript-eslint". Should they be included too?
For the plugins section, do I just list each eslint-plugin-.... package that I installed?
Here's an example, please let me know how this looks:
Installed packages
#typescript-eslint/eslint-plugin
#typescript-eslint/parser
eslint
eslint-config-airbnb
eslint-config-prettier
eslint-plugin-import
eslint-plugin-jest
eslint-plugin-jsx-a11y
eslint-plugin-prettier
eslint-plugin-react
eslint-plugin-react-hooks
prettier
Config file:
{
"extends": [
"airbnb",
"plugin:#typescript-eslint/recommended",
"plugin:jest/recommended",
"plugin:prettier/recommended",
"plugin:react/recommended",
"prettier",
"prettier/#typescript-eslint"
],
"parser": "#typescript-eslint/parser",
"plugins": [
"#typescript-eslint",
"import",
"jest",
"jsx-a11y",
"react",
"react-hooks"
],
}
Thought I'd come back an answer this. Here's my final configuration that works:
module.exports = {
"env": {
"browser": true,
"es6": true,
"jest": true,
"node": true
},
"extends": [
"airbnb",
"plugin:#typescript-eslint/recommended",
"plugin:import/typescript",
"plugin:jest/recommended",
"plugin:react/recommended",
"plugin:prettier/recommended",
"prettier",
"prettier/#typescript-eslint",
"prettier/react"
],
"parser": "#typescript-eslint/parser",
"parserOptions": {
"ecmaVersion": 2018,
"jsx": true,
"sourceType": "module",
"useJSXTextNode": true
},
"plugins": ["#typescript-eslint", "import", "jest", "react", "prettier"],
"rules": {
"#typescript-eslint/explicit-function-return-type": [
"error",
{
"allowExpressions": true,
"allowTypedFunctionExpressions": true
}
],
"#typescript-eslint/explicit-member-accessibility": "off",
"import/no-extraneous-dependencies": 0,
"react/jsx-filename-extension": ["error", { extensions: [".jsx", ".tsx"] }],
"react/prop-types": [0]
},
"settings": {
"react": {
"version": "detect"
}
}
}
I've installed eslint-plugin-angular globally.
eg:
npm install -g eslint
npm install -g eslint-plugin-angular
According to http://eslint.org/docs/user-guide/configuring using .json files is an option.
Here's my .eslintrc.json file.
json
{
"env" : {
"browser": true,
"jquery": true
},
"plugins": [
"angular"
],
"extends": [
"eslint:recommended",
"plugin:angular/johnpapa"
],
"rules": {
"semi": ["error", "always"]
}
}
The main error I'm running into is this:
TypeError: Cannot read property 'johnpapa' of undefined
Looking at the documentation: https://github.com/Gillespie59/eslint-plugin-angular#usage-without-shareable-config
I can't see why plugin:angular/johnpapa wouldn't work. Do you have to use .yml?
Please see the changed .eslintrc.json below.
{
"env": {
"browser": true,
"es6": true
},
"globals": {
"angular": true,
"require": true
},
"parserOptions": {
"sourceType": "module"
},
"extends": [
"eslint:recommended",
"plugin:angular/johnpapa"
],
"rules": { /* rules here */ }
}