代码格式化

docs/sw.js

@@ -11,7 +11,7 @@ const HOSTNAME_WHITELIST = [
   self.location.hostname,
   'fonts.gstatic.com',
   'fonts.googleapis.com',
-  'unpkg.com'
+  'unpkg.com',
 ]
 
 // The Util Function to hack URLs of intercepted requests
@@ -42,7 +42,7 @@ const getFixedUrl = (req) => {
  *
  *  waitUntil(): activating ====> activated
  */
-self.addEventListener('activate', event => {
+self.addEventListener('activate', (event) => {
   event.waitUntil(self.clients.claim())
 })
 
@@ -52,7 +52,7 @@ self.addEventListener('activate', event => {
  *
  *  void respondWith(Promise<Response> r)
  */
-self.addEventListener('fetch', event => {
+self.addEventListener('fetch', (event) => {
   // Skip some of cross-origin requests, like those for Google Analytics.
   if (HOSTNAME_WHITELIST.indexOf(new URL(event.request.url).hostname) > -1) {
     // Stale-while-revalidate
@@ -61,23 +61,30 @@ self.addEventListener('fetch', event => {
     const cached = caches.match(event.request)
     const fixedUrl = getFixedUrl(event.request)
     const fetched = fetch(fixedUrl, { cache: 'no-store' })
-    const fetchedCopy = fetched.then(resp => resp.clone())
+    const fetchedCopy = fetched.then((resp) => resp.clone())
 
     // Call respondWith() with whatever we get first.
     // If the fetch fails (e.g disconnected), wait for the cache.
     // If there’s nothing in cache, wait for the fetch.
     // If neither yields a response, return offline pages.
     event.respondWith(
-      Promise.race([fetched.catch(_ => cached), cached])
-        .then(resp => resp || fetched)
-        .catch(_ => { /* eat any errors */ })
+      Promise.race([fetched.catch((_) => cached), cached])
+        .then((resp) => resp || fetched)
+        .catch((_) => {
+          /* eat any errors */
+        }),
     )
 
     // Update the cache with the version we fetched (only for ok status)
     event.waitUntil(
       Promise.all([fetchedCopy, caches.open(RUNTIME)])
-        .then(([response, cache]) => response.ok && cache.put(event.request, response))
-        .catch(_ => { /* eat any errors */ })
+        .then(
+          ([response, cache]) =>
+            response.ok && cache.put(event.request, response),
+        )
+        .catch((_) => {
+          /* eat any errors */
+        }),
     )
   }
 })