.eslintrc.json

{
    "root": true,
    "parser": "@typescript-eslint/parser",
    "plugins": ["svelte3", "@typescript-eslint"],
    "extends": ["eslint:recommended", "prettier"],
    "rules": {
        "no-useless-escape": "off",
        "no-prototype-builtins": "off",
        "no-async-promise-executor": "off",
        "semi": ["error", "always"],
        "no-multiple-empty-lines": ["error", { "max": 2 }],
        "no-console": [
            "error",
            {
                "allow": ["info", "warn", "error"]
            }
        ]
    },
    "parserOptions": {
        "extraFileExtensions": ".svelte"
    },
    "overrides": [
        {
            "files": ["**/*.js"],
            "env": {
                "node": true
            }
        },
        {
            "files": ["extension/**/*.svelte"],
            "processor": "svelte3/svelte3",
            "rules": {
                "no-undef": "off"
            }
        },
        {
            "files": ["**/*.ts", "extension/**/*.svelte"],
            "extends": "plugin:@typescript-eslint/recommended",
            "rules": {
                "@typescript-eslint/no-empty-interface": "error",
                "@typescript-eslint/no-explicit-any": "off",
                "@typescript-eslint/explicit-module-boundary-types": "off",
                "@typescript-eslint/no-unused-vars": [
                    "error",
                    { "argsIgnorePattern": "^_" }
                ],
                "@typescript-eslint/ban-ts-comment": "off",
                "@typescript-eslint/no-this-alias": [
                    "error",
                    {
                        "allowedNames": ["this_"]
                    }
                ]
            }
        }
    ],
    "settings": {
        "svelte3/typescript": true
    }
}