.eslintrc.json

{
  "parser": "@typescript-eslint/parser",
  "plugins": [
    "svelte3",
    "@typescript-eslint"
  ],
  "extends": [
    "eslint:recommended",
    "plugin:import/recommended",
    "plugin:@typescript-eslint/recommended"
  ],
  "env": {
    "browser": true,
    "node": true
  },
  "overrides": [
    {
      "files": [
        "**/*.svelte"
      ],
      "processor": "svelte3/svelte3",
      "rules": {
        "no-undef": "off"
      }
    }
  ],
  "parserOptions": {
    "ecmaVersion": 2019,
    "sourceType": "module"
  },
  "rules": {
    "arrow-parens": 0,
    "curly": [
      2,
      "multi-line"
    ],
    "quotes": [
      2,
      "single",
      "avoid-escape"
    ],
    "semi": [
      2,
      "always"
    ],
    "strict": 0,
    "no-use-before-define": 0,
    "import/no-unresolved": 0
  },
  "settings": {
    "svelte3/typescript": true
  }
}