@20i/eslint-config v3.2.0

eslint-config-20i

Auto Install

Use mrm to install all dependencies and add config files.

npx mrm eslint --preset @20i/mrm-preset

Manual Install

1. Install dev dependencies:

   yarn add -D eslint prettier typescript @20i/eslint-config
   # or
   npm i -D eslint prettier typescript @20i/eslint-config

2. Create a new file, .eslintrc.js, in the directory of your project.

3. Add the following code to the file.

   module.exports = {
     extends: ["@20i/eslint-config"],
     parserOptions: {
       project: ["./tsconfig.eslint.json"],
     },
     ignorePatterns: [],
   }

   ⚠️ For React projects, set @20i/eslint-config/react instead.

4. Add a special tsconfig.json file to your project: tsconfig.eslint.json

   {
     // extend your base config to share compilerOptions, etc
     "extends": "./tsconfig.json",
     "compilerOptions": {
       // ensure that nobody can accidentally use this config for a build
       "noEmit": true
     },
     "include": [
       "**/*",
       "**/.*"
     ],
   }

5. Add the following to your .prettierrc file:

   {
     "endOfLine": "auto",
     "semi": false,
     "trailingComma": "es5"
   }

Configure VS Code

1. Make sure these extensions are installed:

   • ESlint
   • Prettier - Code formatter

   • Install from the links above or via terminal:

     code --install-extension dbaeumer.vscode-eslint && \
     code --install-extension esbenp.prettier-vscode

2. Add the following to your global ~/.vscode/settings.json file:

   {
     "editor.codeActionsOnSave": {
       "source.fixAll": true
     },
     // format on save for everything, but what prettier will handle through eslint
     "editor.formatOnSave": true,
     "[javascriptreact]": {
       "editor.formatOnSave": false,
     },
     "[javascript]": {
       "editor.formatOnSave": false,
     },
     "[typescript]": {
       "editor.formatOnSave": false,
     },
     "[typescriptreact]": {
       "editor.formatOnSave": false,
     },
   }

3. Restart VS Code

References

Inspired heavily by eslint-config-wesbos