.eslintrc.json

{
  "root": true,
  "rules": {
    "semi": [2, "always"],
    "keyword-spacing": [2, { "before": true, "after": true }],
    "space-before-blocks": [2, "always"],
    "space-before-function-paren": [2, "always"],
    "no-mixed-spaces-and-tabs": [2, "smart-tabs"],
    "no-cond-assign": 0,
    "no-unused-vars": 2,
    "object-shorthand":  [2, "always"],
    "no-const-assign": 2,
    "no-class-assign": 2,
    "no-this-before-super": 2,
    "no-var": 2,
    "no-unreachable": 2,
    "valid-typeof": 2,
    "quote-props": [2, "as-needed"],
    "one-var": [2, "never"],
    "prefer-arrow-callback": 2,
    "prefer-const": [2, { "destructuring": "all" }],
    "arrow-spacing": 2,
    "no-inner-declarations": 0
  },
  "env": {
    "es6": true,
    "browser": true,
    "node": true,
    "mocha": true
  },
  "extends": [
    "eslint:recommended",
    "plugin:import/errors",
    "plugin:import/warnings"
  ],
  "parserOptions": {
    "ecmaVersion": 6,
    "sourceType": "module"
  },
  "settings": {
    "import/core-modules": ["svelte"]
  }
}