.eslintrc.json

{
    "globals" : {
      "rawData": false,
      "app": false,
      "Handlebars": false,
      "page": false,
      "$": false,
      "marked": false,
      "hljs": false,
      "API_URL": false,
      "google" : false
    },
    "extends": "eslint:recommended",
    "parserOptions": {
      "ecmaVersion": 6,
      "ecmaFeatures": {"impliedStrict": true}
    },
    "env": {
      "browser": true,
      "jquery": true,
      "node": true,
      "es6": true
    },
    "rules": {
      "no-console": "off",
      "semi": ["error", "always"],
      "quotes": ["warn", "single", {"allowTemplateLiterals": true}],
      "indent": ["error", 4],
      "space-infix-ops": ["error", {"int32Hint": false}],
      "no-trailing-spaces": ["warn", { "skipBlankLines": true, "ignoreComments": true }],
      "no-multi-spaces": ["warn", {"exceptions": { "VariableDeclarator": true }}],
      "no-mixed-spaces-and-tabs": "warn",
  
      "no-undef": "error",
      "no-undefined": "error",
      "no-unused-vars": "error",
    
      "no-var": "warn",
      "prefer-const": "warn",
  
      "eqeqeq": ["error", "always"],
      "no-template-curly-in-string": "error",
  
      "new-cap": "warn",
      "no-redeclare": ["error", { "builtinGlobals": true }]
    }
  }