Specify more eslint rules

frontend/.eslintrc.json

@@ -10,7 +10,16 @@
     "react-hooks/exhaustive-deps": "off",
     "space-infix-ops": "warn",
     "comma-spacing": "warn",
-    "react-hooks/rules-of-hooks": "off"
+    "react-hooks/rules-of-hooks": "off",
+    "eqeqeq": "error",
+    "no-return-await": "warn",
+    "no-var": "error",
+    "prefer-const": "warn",
+    "eol-last": ["warn", "always"],
+    "indent": ["warn", 2],
+    "semi": ["error", "never"],
+    "arrow-parens": ["error", "as-needed"],
+    "jsx-quotes": ["warn", "prefer-double"]
   },
   "overrides": [
     {

frontend/src/components/AvailabilityEditor/components/RecentEvents/RecentEvents.tsx

@@ -22,12 +22,10 @@ const RecentEvents = ({ eventId, times, onImport }: RecentEventsProps) => {
   const { t, i18n } = useTranslation('event')
 
   const allRecents = useStore(useRecentsStore, state => state.recents)
-  const recents = useMemo(() =>
-    allRecents
+  const recents = useMemo(() => allRecents
     ?.filter(hasAvailability)
     .filter(e => e.id !== eventId && e.user.availability.some(a => times.includes(a))) ?? [],
-    [allRecents]
-  )
+  [allRecents])
 
   const [isOpen, setIsOpen] = useState(false)
   const [selected, setSelected] = useState<string>()

frontend/src/components/CalendarField/components/Month/Month.tsx

@@ -121,7 +121,7 @@ const Month = ({ value, onChange }: MonthProps) => {
     </div>
 
     {hasPastDates && <div className={styles.warningLabel}>
-      <AlertTriangle size='1.2em' />
+      <AlertTriangle size="1.2em" />
       <span>{t('form.dates.warnings.date_in_past')}</span>
     </div>}
   </>

frontend/src/utils/detectBrowser.ts

@@ -20,6 +20,7 @@ export const detectBrowser = () => {
   const isChrome = !!window.chrome
 
   // Edge (based on chromium) detection
+  // eslint-disable-next-line eqeqeq
   const isEdgeChromium = isChrome && (navigator.userAgent.indexOf("Edg") != -1)
 
   if (isEdgeChromium) return 'edge_chromium'