.eslintrc.json

{
    "env": {
        "browser": true,
        "es2021": true,
        "node": true
    },
    "extends": [
        "eslint:recommended",
        "plugin:@typescript-eslint/recommended"
    ],
    "parser": "@typescript-eslint/parser",
    "parserOptions": {
        "ecmaVersion": "latest",
        "sourceType": "module"
    },
    "plugins": [
        "@typescript-eslint",
        "svelte"
    ],
    "overrides": [
        {
            "files": ["*.svelte"],
            "processor": "svelte/svelte",
            "extends": [
                "plugin:svelte/recommended"
            ],
            "parser": "svelte-eslint-parser",
            "parserOptions": {
                "parser": "@typescript-eslint/parser"
            },
            "rules": {
                "no-unused-vars": "warn",
                "svelte/valid-compile": "warn" // we should not keep this rule since this is quite important check
            }
        }
    ],
    "rules": {
        // General ESLint rules
        "@typescript-eslint/no-unused-vars": "warn"
    }
}