.eslintrc

// eslint-plugin-svelte
// https://sveltejs.github.io/eslint-plugin-svelte/user-guide/
{
  "root": true,
  "extends": [
    // add more generic rule sets here, such as:
    // 'eslint:recommended',
    "plugin:@typescript-eslint/recommended",
    "prettier",
    "plugin:svelte/recommended"
  ],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    // ...
    "project": "./tsconfig.json",
    "extraFileExtensions": [".svelte"] // This is a required setting in `@typescript-eslint/parser` v4.24.0.
  },
  "plugins": ["@typescript-eslint", "prettier"],
  "rules": {
    "no-console": 1,
    "prettier/prettier": 2,
    "comma-dangle": [2, "always-multiline"],
    "no-alert": "off",
    "no-unused-vars": "off",
    "@typescript-eslint/no-unused-vars": [
      "error",
      {
        "argsIgnorePattern": "^_",
        "varsIgnorePattern": "^_"
      }
    ]
    // 'svelte/rule-name': 'error'
  },
  "overrides": [
    {
      "files": ["*.svelte"],
      "parser": "svelte-eslint-parser",
      // Parse the `<script>` in `.svelte` as TypeScript by adding the following configuration.
      "parserOptions": {
        "parser": "@typescript-eslint/parser"
      }
    }
  ]
}