VS Code ESLint extension

Integrates ESLint into VS Code. If you are new to ESLint check the documentation.

The extension uses the ESLint library installed in the opened workspace folder. If the folder doesn't provide one the extension looks for a global install version. If you haven't installed ESLint either locally or globally do so by running npm install eslint in the workspace folder for a local install or npm install -g eslint for a global install.

On new folders you might also need to create a .eslintrc configuration file. You can do this by either using the VS Code command Create ESLint configuration or by running the eslint command in a terminal. If you have installed ESLint globally (see above) then run eslint --init in a terminal. If you have installed ESLint locally then run .\node_modules\.bin\eslint --init under Windows and ./node_modules/.bin/eslint --init under Linux and Mac.

Settings Options

This extension contributes the following variables to the settings:

• eslint.enable: enable/disable ESLint. Is enabled by default.

• eslint.provideLintTask: whether the extension contributes a lint task to lint a whole workspace folder.

• eslint.packageManager: controls the package manager to be used to resolve the ESLint library. This has only an influence if the ESLint library is resolved globally. Valid values are "npm" or "yarn".

• eslint.options: options to configure how ESLint is started using the ESLint CLI Engine API. Defaults to an empty option bag. An example to point to a custom .eslintrc.json file is:

  {
    "eslint.options": { "configFile": "C:/mydirectory/.eslintrc.json" }
  }

• eslint.run - run the linter onSave or onType, default is onType.

• eslint.autoFixOnSave - enables auto fix on save. Please note auto fix on save is only available if VS Code's files.autoSave is either off, onFocusChange or onWindowChange. It will not work with afterDelay.

• eslint.runtime - use this setting to set the path of the node runtime to run ESLint under.

• eslint.nodePath - use this setting if an installed ESLint package can't be detected, for example /myGlobalNodePackages/node_modules.

• eslint.validate - an array of language identifiers specify the files to be validated. Something like "eslint.validate": [ "javascript", "javascriptreact", "html" ]. If the setting is missing, it defaults to ["javascript", "javascriptreact"]. You can also control which plugins should provide autofix support. To do so simply provide an object literal in the validate setting with the properties language and autoFix instead of a simple string. An example is:

  "eslint.validate": [ "javascript", "javascriptreact", { "language": "html", "autoFix": true } ]

• eslint.workingDirectories - an array for working directories to be used. ESLint resolves configuration files relative to a working directory. This new settings allows users to control which working directory is used for which files. Consider the following setups:

  client/
    .eslintignore
    .eslintrc.json
    client.js
  server/
    .eslintignore
    .eslintrc.json
    server.js
  

  Then using the setting:

    "eslint.workingDirectories": [
      "./client", "./server"
    ]

  will validate files inside the server directory with the server directory as the current working directory. Same for files in the client directory. If the setting is omitted the working directory is the workspace folder.

  The setting also supports literals of the form { "directory": string, "changeProcessCWD": boolean } as elements. Use this form if you want to instruct ESLint to change the current working directory of the ESLint validation process to the value of directory as well. This is for example necessary if ESLint is used to validate relative import statements like import A from 'components/A'; which would otherwise be resolved to the workspace folder root.

Commands:

This extension contributes the following commands to the Command palette.

• Create '.eslintrc.json' file: creates a new .eslintrc.json file.
• Fix all auto-fixable problems: applies ESLint auto-fix resolutions to all fixable problems.
• Disable ESLint for this Workspace: disables ESLint extension for this workspace.
• Enable ESLint for this Workspace: enable ESLint extension for this workspace.

Using the extension with VS Code's task running

The extension lints an individual file only on typing. If you want to lint the whole workspace set eslint.provideLintTask to true and the extension will also contribute the eslint: lint whole folder task. There is no need anymore to define a custom task in tasks.json.