Javascript Code Snippets

javascript-snippets.md

Javascript Code Snippets

hello

asdf

cache-refresh-stratedgy

self.addEventListener('fetch', function(evt) {
  evt.respondWith(fromCache(evt.request));
  evt.waitUntil(
    update(evt.request)
    .then(refresh)
  );
});

function refresh(response) {
  return self.clients.matchAll().then(function (clients) {
    clients.forEach(function (client) {
      var message = {
        type: 'refresh',
        url: response.url,
        eTag: response.headers.get('ETag')
      };
      client.postMessage(JSON.stringify(message));
    });
  });
}