Add .eslintrc.json

And fix issues

.eslintrc.json

@@ -0,0 +1,24 @@
+{
+    "root": true,
+    "env": {
+        "es2022": true,
+        "browser": true
+    },
+    "parserOptions": {
+        "ecmaVersion": 2022,
+        "sourceType": "module"
+    },
+    "extends": "eslint:recommended",
+    "rules": {
+        "semi": ["error", "never"],
+        "indent": ["warn", 4, { "flatTernaryExpressions": true, "SwitchCase": 1 }],
+        "quotes": ["warn", "single"],
+        "comma-dangle": ["warn", "always-multiline"],
+        "no-trailing-spaces": "warn",
+        "no-unused-vars": "warn",
+        "no-console": ["warn", { "allow": ["debug", "warn", "error", "assert"] }],
+        "no-constant-condition": ["error", { "checkLoops": false }],
+        "no-empty": ["error", { "allowEmptyCatch": true }]
+    },
+    "reportUnusedDisableDirectives": true
+}

fb2.js

@@ -248,7 +248,7 @@ export const makeFB2 = async blob => {
         modified: getDate($('document-info date')),
         description: annotation ? converter.convert(annotation,
             { annotation: ['div', SECTION] }).innerHTML : null,
-        subject: $$('title-info genre').map(getElementText)
+        subject: $$('title-info genre').map(getElementText),
     }
     book.getCover = () => fetch(getImageSrc($('coverpage image')))
         .then(res => res.blob())

paginator.js

@@ -124,8 +124,8 @@ const getBackground = doc => {
     const bodyStyle = doc.defaultView.getComputedStyle(doc.body)
     return bodyStyle.backgroundColor === 'rgba(0, 0, 0, 0)'
         && bodyStyle.backgroundImage === 'none'
-            ? doc.defaultView.getComputedStyle(doc.documentElement).background
+        ? doc.defaultView.getComputedStyle(doc.documentElement).background
-            : bodyStyle.background
+        : bodyStyle.background
 }
 
 class View {

reader.js

@@ -35,7 +35,7 @@ const makeDirectoryLoader = async entry => {
     const files = await Promise.all(
         entries.map(entry => new Promise((resolve, reject) =>
             entry.file(file => resolve([file, entry.fullPath]),
-            error => reject(error)))))
+                error => reject(error)))))
     const map = new Map(files.map(([file, path]) =>
         [path.replace(entry.fullPath + '/', ''), file]))
     const decoder = new TextDecoder()
@@ -176,7 +176,7 @@ class Reader {
                     this.layout.flow = value
                     this.setAppearance()
                 },
-            }
+            },
         ])
         menu.element.classList.add('menu')