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Standard ESLint + Prettier config

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ESLint and Prettier Setup

This package provides u+i's base ESLint and Prettier config.

What it does

  • Lint JavaScript based on the latest standards
  • Fixes issues and formatting errors with Prettier
  • Lints + Fixes inside of html script tags
  • Lints + Fixes JavaScript via eslint-config-airbnb-base

Install

  1. If you don't already have a package.json file, create one with npm init.
  2. Then we need to install everything needed by the config:
    npx install-peerdeps --dev @uandi/eslint-config-standard
    
  3. You can see in your package.json there are now a big list of devDependencies.
  4. Create a .eslintc file in the root of your project's directory (it should live where package.json does). Your .eslintrc file should look like this:
    {
        "extends": [
            "@uandi/standard"
        ]
    }
  5. You can add two scripts to your package.json to lint and/or fix:
    "scripts": {
        "lint": "eslint .",
        "lint:fix": "eslint . --fix"
    }
    Note: Replace . after the eslint command with the relative path to your code source.
  6. Now you can manually lint your code by running npm run lint and fiz all fixable issues with npm run lint:fix. You probably want your editor to do this though.

Settings

If you'd like to overwrite eslint or prettier settings, you can add the rules in your .eslintrc file. The ESLint rules go directly under "rules" while prettier options go under "prettier/prettier". Note that prettier rules overwrite anything in my config (trailing comma, and single quote), so you'll need to include those as well.

{
    "extends": [
        "@uandi/standard"
    ],
    "rules": {
        "no-console": 2
    }
}

With VSCode

You should read this entire thing. Serious!

Once you have done one, or both, of the above installs. You probably want your editor to lint and fix for you. Here are the instructions for VS Code:

  1. Install the ESLint package
  2. Now we need to setup some VS Code settings via Code/FilePreferencesSettings. It's easier to enter these settings while editing the settings.json file, so click the {} icon in the top right corner:
    "editor.formatOnPaste": false,
    "editor.formatOnSave": true,
    "editor.formatOnType": false,
    // Turn off VSCode auto format, we will do this via eslint
    "[javascript]": {
        "editor.formatOnSave": false
    },
    "[javascriptreact]": {
        "editor.formatOnSave": false
    },
    "[vue]": {
        "editor.formatOnSave": false
    },
    "[html]": {
        "editor.formatOnSave": false
    },
    // enable eslint
    "eslint.enable": true,
    // tell the ESLint plugin to run on save
    "eslint.autoFixOnSave": true,
    // set correct fix settings for each eslint language
    "eslint.validate": [
        "javascript",
        "javascriptreact",
        {
            "language": "vue",
            "autoFix": true
        },
        {
            "language": "html",
            "autoFix": true
        }
    ],
    // Optional BUT IMPORTANT: If you have the prettier extension enabled for other languages like CSS and HTML, turn it off for JS since we are doing it through Eslint already
    "prettier.disableLanguages": ["javascript", "vue", "html"],

🤬🤬🤬🤬 IT'S NOT WORKING

Start fresh. Sometimes global modules can goof you up. This will remove them all.

npm remove --global @uandi/eslint-config-standard babel-eslint eslint eslint-config-prettier eslint-config-airbnb-base eslint-plugin-html eslint-plugin-prettier eslint-plugin-import prettier

To do the above for local, omit the --global flag.

Then if you are using a local install, remove your package-lock.json file and delete the node_modules/ directory.

Then follow the above instructions again.

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