Adding eslintrc and add linting

.eslintrc

@@ -0,0 +1,131 @@
+{
+  "env": {
+    "browser": true
+  },
+  "parserOptions": {
+    "ecmaVersion": 6,
+    "sourceType": "module"
+  },
+  "rules": {
+    "no-cond-assign": 0, // eslint:recommended
+    "no-console": 2, // eslint:recommended
+    "no-constant-condition": 2, // eslint:recommended
+    "no-control-regex": 2, // eslint:recommended
+    "no-debugger": 2, // eslint:recommended
+    "no-dupe-args": 2, // eslint:recommended
+    "no-dupe-keys": 2, // eslint:recommended
+    "no-duplicate-case": 2, // eslint:recommended
+    "no-empty-character-class": 2, // eslint:recommended
+    "no-empty": [2, {
+      "allowEmptyCatch": true
+    }], // eslint:recommended
+    "no-ex-assign": 2, // eslint:recommended
+    "no-extra-boolean-cast": 2, // eslint:recommended
+    "no-extra-semi": 2, // eslint:recommended
+    "no-func-assign": 2, // eslint:recommended
+    "no-inner-declarations": 2, // eslint:recommended
+    "no-invalid-regexp": 2, // eslint:recommended
+    "no-irregular-whitespace": 2, // eslint:recommended
+    "no-obj-calls": 2, // eslint:recommended
+    "no-regex-spaces": 2, // eslint:recommended
+    "no-sparse-arrays": 2, // eslint:recommended
+    "no-unexpected-multiline": 2, // eslint:recommended
+    "no-unreachable": 2, // eslint:recommended
+    "no-unsafe-finally": 2, // eslint:recommended
+    "use-isnan": 2,
+    "valid-jsdoc": [2, {
+      "requireParamDescription": false,
+      "requireReturnDescription": false,
+      "requireReturn": false,
+      "prefer": {"returns": "return"}
+    }],
+    "valid-typeof": 2,
+
+    // Best Practices
+    "eqeqeq": 0,
+    "guard-for-in": 2,
+    "no-alert": 0,
+    "no-caller": 2,
+    "no-case-declarations": 2, // eslint:recommended
+    "no-empty-pattern": 2, // eslint:recommended
+    "no-extend-native": 2,
+    "no-extra-bind": 2,
+    "no-fallthrough": 2, // eslint:recommended
+    "no-invalid-this": 2,
+    "no-multi-spaces": 2,
+    "no-multi-str": 2,
+    "no-new-wrappers": 2,
+    "no-octal": 2, // eslint:recommended
+    "no-redeclare": 2, // eslint:recommended
+    "no-self-assign": 2, // eslint:recommended
+    "no-throw-literal": 2, // eslint:recommended
+    "no-unused-labels": 2, // eslint:recommended
+    "no-with": 2,
+    "no-delete-var": 2, // eslint:recommended
+    "no-undef": 2, // eslint:recommended
+    "no-unused-vars": [2, {"args": "none"}],
+    // Stylistic Issues
+    // ----------------------------------------------
+    "array-bracket-spacing": [2, "never"],
+    "brace-style": 2,
+    "camelcase": [2, {"properties": "never"}],
+    "comma-dangle": [2, "never"],
+    "comma-spacing": 2,
+    "comma-style": 2,
+    "computed-property-spacing": 2,
+    "eol-last": 2,
+    "func-call-spacing": 2,
+    "key-spacing": 2,
+    "keyword-spacing": 0,
+    "linebreak-style": 2,
+    "new-cap": 2,
+    "no-array-constructor": 2,
+    "no-mixed-spaces-and-tabs": 2, // eslint:recommended
+    "no-multiple-empty-lines": [2, {"max": 2}],
+    "no-new-object": 2,
+    "no-trailing-spaces": 2,
+    "object-curly-spacing": 2,
+    "one-var": [2, {
+      "var": "never",
+      "let": "never",
+      "const": "never"
+    }],
+    "padded-blocks": [2, "never"],
+    "quote-props": [2, "consistent"],
+    "quotes": [2, "single", {"allowTemplateLiterals": true}],
+    "require-jsdoc": [2, {
+      "require": {
+        "FunctionDeclaration": true,
+        "MethodDefinition": true,
+        "ClassDeclaration": true
+      }
+    }],
+    "semi-spacing": 2,
+    "semi": 2,
+    "space-before-blocks": 2,
+    "space-before-function-paren": [2, "never"],
+    "spaced-comment": [2, "always"],
+
+    // ECMAScript 6
+    // http://eslint.org/docs/rules/#ecmascript-6
+    // ------------------------------------------
+    "arrow-parens": [2, "as-needed"],
+    "constructor-super": 2, // eslint:recommended
+    "generator-star-spacing": [2, "after"],
+    "no-const-assign": 0, // eslint:recommended
+    "no-dupe-class-members": 0, // eslint:recommended
+    "no-new-symbol": 2, // eslint:recommended
+    "no-this-before-super": 2,  // eslint:recommended
+    "no-var": 2,
+    "prefer-rest-params": 2,
+    "prefer-spread": 2,
+    "prefer-const": 2,
+    "prefer-arrow-callback": 2,
+    "prefer-template": 2,
+    "require-yield": 2, // eslint:recommended
+    "rest-spread-spacing": 2,
+    "yield-star-spacing": [2, "after"]
+  }
+}
+
+