Improve linting

.editorconfig

@@ -8,6 +8,6 @@ end_of_line = lf
 insert_final_newline = true
 trim_trailing_whitespace = true
 
-[{*.json,*.yml,*.pug,*.md}]
+[*.{json,yml,pug,md}]
 indent_style = space
 indent_size = 2

.eslintrc.json

@@ -1,26 +0,0 @@
-{
-  "env": {
-    "node": true,
-    "es6": true
-  },
-  "parserOptions": {
-      "ecmaVersion": 11
-  },
-  "extends": ["eslint:recommended"],
-  "rules": {
-    "comma-dangle": ["error"],
-    "indent": ["error", "tab"],
-    "linebreak-style": ["error", "unix"],
-    "no-console": ["warn", { "allow": ["warn", "error"] }],
-    "no-extra-parens": ["error"],
-    "no-loss-of-precision": ["error"],
-    "no-promise-executor-return": ["error"],
-    "no-template-curly-in-string": ["error"],
-    "no-trailing-spaces": ["warn"],
-    "no-unreachable-loop": ["error"],
-    "no-useless-backreference": ["error"],
-    "quotes": ["error", "single", "avoid-escape"],
-    "semi": ["error", "always"],
-    "space-before-function-paren": ["error", { "anonymous": "never", "named": "never", "asyncArrow": "always" }]
-  }
-}

.xo-config.json

@@ -0,0 +1,38 @@
+{
+  "rules": {
+    "arrow-parens": ["error", "always"],
+    "curly": ["error", "multi-line"],
+    "new-cap": ["error", {
+      "capIsNew": false
+    }],
+    "no-console": ["error", {
+      "allow": ["warn", "error"]
+    }],
+    "object-curly-spacing": ["error", "always"],
+    "space-before-function-paren": ["error", {
+      "anonymous": "never",
+      "named": "never"
+    }],
+    "unicorn/prevent-abbreviations": "off",
+    "unicorn/catch-error-name": ["error", {
+      "name": "err"
+    }],
+    "import/no-unassigned-import": ["error", {
+      "allow": ["db"]
+    }],
+    "quotes": ["error", "single", {
+      "avoidEscape": true
+    }]
+  },
+  "overrides": [{
+    "files": "public/*.js",
+    "esnext": false,
+    "envs": ["browser", "jquery"],
+    "globals": ["autosize"],
+    "rules": {
+      "camelcase": ["error", {
+        "allow": ["buttondown_class", "buttonup_class"]
+      }]
+    }
+  }]
+}

package.json

@@ -19,7 +19,7 @@
   "main": "server.js",
   "scripts": {
     "watch": "nodemon -L -e js,json,pug -i ./public",
-    "lint": "eslint . && pug-lint ./views"
+    "lint": "xo && pug-lint ./views && eclint ."
   },
   "dependencies": {
     "bytes": "^3.1.0",
@@ -40,8 +40,9 @@
     "pug": "^3.0.0"
   },
   "devDependencies": {
-    "eslint": "^7.5.0",
+    "eclint": "^2.8.1",
     "nodemon": "^2.0.4",
     "pug-lint": "^2.6.0"
+    "xo": "^0.32.1"
   }
 }