VSCode failed to load plugin cannot find module 'eslint-plugin-prettier'

Question

I'm installing eslint and Prettier in my project and trying to get automatic code formatting to work through VSCode. When I go to a React file, I see that ESLint is in error so I open up the ESLint console where I see:

Failed to load plugin 'prettier' declared in 'js/.eslintrc.js': Cannot find module 'eslint-plugin-prettier'

I believe I have all the necessary modules installed, here is a piece of my package.json file:

  "devDependencies": {
    "babel-eslint": "^10.0.3",
    "babel-loader": "^8.0.6",
    "eslint": "^6.8.0",
    "eslint-config-prettier": "^6.10.0",
    "eslint-loader": "^3.0.3",
    "eslint-plugin-prettier": "^3.1.2",
    "eslint-plugin-react": "^7.18.3",
    "prettier": "1.19.1"
  }

The only thing I can think of is that this is being caused by my project directory structure, which is as follows:

/
(some Java stuff out here)
js/
  node_modules/
  package.json
  package-lock.json
  .eslintrc.js
  .prettierrc

For reference, here is my .eslintrc.js:

module.exports = {
    root: true,
    env: {
      browser: true,
      node: true
    },
    parserOptions: {
      parser: 'babel-eslint',
      ecmaVersion: 2015,
      sourceType: 'module'
    },
    extends: [
      'prettier',
      'plugin:prettier/recommended'
    ],
    plugins: [
        'react',
        'prettier'
    ],
    rules: {
    }
  }

For further reference, here is my settings.json in VSCode:

{
    "terminal.integrated.shell.osx": "/bin/zsh",
    "editor.formatOnSave": false,
    // turn it off for JS and JSX, we will do this via eslint
    "[javascript]": {
        "editor.formatOnSave": false
    },
    "[javascriptreact]": {
        "editor.formatOnSave": false
    },
    // tell the ESLint plugin to run on save
    "eslint.validate": [ "vue", "html", "javascript", "javascriptreact"],
    "prettier.disableLanguages": [
        "javascript", "javascriptreact"
    ],
    "eslint.workingDirectories": [
        { "mode": "auto" }
    ],
    "liveServer.settings.donotShowInfoMsg": true,
    "workbench.startupEditor": "welcomePage",
    "editor.codeActionsOnSave": {
        "source.fixAll.eslint": true
    },
    "liveServer.settings.donotVerifyTags": true,
    "diffEditor.ignoreTrimWhitespace": false,
}

Update: It seems like this is an issue with VSCode doing autoformatting on subdirectories. Once I opened just the subdirectory as the "project root" in VSCode then it started doing all the formatting for me on save. I'm still curious if I can get this working without this workaround.

Answer 1

i had the same issue.

In your root workspace you have a .vscode folder with a settings.json.

Add the following:

{
  "eslint.workingDirectories": [
    "./{PATH_TO_CLIENT}" // replace {PATH_TO_CLIENT} with you own path
  ]
}

related issue: create-react-app subfolder projects do not lint

Answer 2

VSCode/eslint will not pick newly installed npm packages in the node_modules directory. After running npm i eslint-plugin-prettier restart the VSCode workspace. Happens to me consistently, every time I setup a new Javascript/Node/React project and add eslint & prettier, using this guide in the order it suggests.