perf: lean bootstrap javascript (#1734)

assets/js/pwa/app.js

@@ -1,56 +0,0 @@
----
-layout: compress
-permalink: /assets/js/dist/:basename.min.js
----
-
-if ('serviceWorker' in navigator) {
-  const isEnabled = '{{ site.pwa.enabled }}' === 'true';
-
-  if (isEnabled) {
-    const swUrl = '{{ '/sw.min.js' | relative_url }}';
-    const notification = document.getElementById('notification');
-    const btnRefresh = notification.querySelector('.toast-body>button');
-    const popupWindow = bootstrap.Toast.getOrCreateInstance(notification);
-
-    navigator.serviceWorker.register(swUrl).then((registration) => {
-      {% comment %}In case the user ignores the notification{% endcomment %}
-      if (registration.waiting) {
-        popupWindow.show();
-      }
-
-      registration.addEventListener('updatefound', () => {
-        registration.installing.addEventListener('statechange', () => {
-          if (registration.waiting) {
-            if (navigator.serviceWorker.controller) {
-              popupWindow.show();
-            }
-          }
-        });
-      });
-
-      btnRefresh.addEventListener('click', () => {
-        if (registration.waiting) {
-          registration.waiting.postMessage('SKIP_WAITING');
-        }
-
-        popupWindow.hide();
-      });
-    });
-
-    let refreshing = false;
-
-    {% comment %}Detect controller change and refresh all the opened tabs{% endcomment %}
-    navigator.serviceWorker.addEventListener('controllerchange', () => {
-      if (!refreshing) {
-        window.location.reload();
-        refreshing = true;
-      }
-    });
-  } else {
-    navigator.serviceWorker.getRegistrations().then(function (registrations) {
-      for (let registration of registrations) {
-        registration.unregister();
-      }
-    });
-  }
-}

assets/js/pwa/sw.js

@@ -1,87 +0,0 @@
----
-layout: compress
-permalink: /:basename.min.js
-# PWA service worker
----
-
-const swconfUrl = '{{ '/assets/js/data/swconf.js' | relative_url }}';
-
-importScripts(swconfUrl);
-const purge = swconf.purge;
-
-function verifyUrl(url) {
-  const requestPath = new URL(url).pathname;
-
-  for (const path of swconf.denyPaths) {
-    if (requestPath.startsWith(path)) {
-      return false;
-    }
-  }
-  return true;
-}
-
-self.addEventListener('install', (event) => {
-  if (purge) {
-    return;
-  }
-
-  event.waitUntil(
-    caches.open(swconf.cacheName).then((cache) => {
-      return cache.addAll(swconf.resources);
-    })
-  );
-});
-
-self.addEventListener('activate', (event) => {
-  event.waitUntil(
-    caches.keys().then((keyList) => {
-      return Promise.all(
-        keyList.map((key) => {
-          if (purge) {
-            return caches.delete(key);
-          } else {
-            if (key !== swconf.cacheName) {
-              return caches.delete(key);
-            }
-          }
-        })
-      );
-    })
-  );
-});
-
-self.addEventListener('message', (event) => {
-  if (event.data === 'SKIP_WAITING') {
-    self.skipWaiting();
-  }
-});
-
-self.addEventListener('fetch', (event) => {
-  if (event.request.headers.has('range')) {
-    return;
-  }
-
-  event.respondWith(
-    caches.match(event.request).then((response) => {
-      if (response) {
-        return response;
-      }
-
-      return fetch(event.request).then((response) => {
-        const url = event.request.url;
-
-        if (purge || event.request.method !== 'GET' || !verifyUrl(url)) {
-          return response;
-        }
-
-        {% comment %}See: <https://developers.google.com/web/fundamentals/primers/service-workers#cache_and_return_requests>{% endcomment %}
-        let responseToCache = response.clone();
-
-        caches.open(swconf.cacheName).then((cache) => {
-          cache.put(event.request, responseToCache);
-        });
-        return response;
-      });
-    })
-  );
-});