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Disable serviceWorker when online


Disable serviceWorker when online

By : Dawn Marie
Date : September 17 2020, 03:00 PM
help you fix your problem It sounds like you want a "Network First" strategy in your Service Worker. This is documented by Jake Archibald for Google. You can read about it here. This type of Service Worker checks for files on the network before looking at the offline cache.
code :


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Difference between serviceWorker.getRegistration and serviceWorker.ready.then

Difference between serviceWorker.getRegistration and serviceWorker.ready.then


By : Bistri
Date : March 29 2020, 07:55 AM
this will help As far I can understand the first one does not wait until the ServiceWorkerRegistration has an active ServiceWorker. The last one does.
Failed to register a ServiceWorker: ServiceWorker cannot be started

Failed to register a ServiceWorker: ServiceWorker cannot be started


By : user3291643
Date : March 29 2020, 07:55 AM
I wish did fix the issue. So it turns out this just indicates there is a JS error in the Service Worker code itself, so the registration couldn't complete.
Load chrome://serviceworker-internals/ and check 'Open DevTools window and pause JavaScript execution on Service Worker startup for debugging.'
PHP disable error reporting when working locally but disable it online

PHP disable error reporting when working locally but disable it online


By : RadOsny
Date : March 29 2020, 07:55 AM
it should still fix some issue
"@Fred-ii- I created something similar myself so I guess thats my solution, if you post this as a answer ill flag it as the solution :)"
code :
if ($_SERVER['HTTP_HOST'] == 'localhost')

    { 
    // do something
    }

    else
    {  
    // do something else
    }
$whitelist = array( '127.0.0.1' ); 

if(!in_array($_SERVER['REMOTE_ADDR'], $whitelist))
    {  
    // do something
    }

    else
    {  
    // do something else
    }
ServiceWorker - Cache all failed post requests when offline and resubmit when online

ServiceWorker - Cache all failed post requests when offline and resubmit when online


By : Lauren Stone
Date : March 29 2020, 07:55 AM
this will help I have achieved my desired result with the following code underneath the following comments.
code :
// Cache signature post request
    //This retrieves all the information about the POST request including the formdata body, where the URL contains updateSignature.
// Resubmit offline signature requests
    //This resubmits all cached POST results and then empties the array.

self.addEventListener('fetch', function(event) {
    // Intercept all fetch requests from the parent page
    event.respondWith(
        caches.match(event.request)
        .then(function(response) {
            // Cache signature post request
            if (event.request.url.includes('updateSignature') && !navigator.onLine) {
                var request = event.request;
                var headers = {};
                for (var entry of request.headers.entries()) {
                    headers[entry[0]] = entry[1];
                }
                var serialized = {
                    url: request.url,
                    headers: headers,
                    method: request.method,
                    mode: request.mode,
                    credentials: request.credentials,
                    cache: request.cache,
                    redirect: request.redirect,
                    referrer: request.referrer
                };
                request.clone().text().then(function(body) {
                    serialized.body = body;
                    callsToCache.push(serialized);
                    console.log(callsToCache);
                });     
            }
            // Immediately respond if request exists in the cache and user is offline
            if (response && !navigator.onLine) {
                return response;
            }
            // Resubmit offline signature requests
            if(navigator.onLine && callsToCache.length > 0) {
                callsToCache.forEach(function(signatureRequest) {
                    fetch(signatureRequest.url, {
                        method: signatureRequest.method,
                        body: signatureRequest.body
                    })
                });
                callsToCache = [];
            }


            // IMPORTANT: Clone the request. A request is a stream and
            // can only be consumed once. Since we are consuming this
            // once by cache and once by the browser for fetch, we need
            // to clone the response
            var fetchRequest = event.request.clone();

            // Make the external resource request
            return fetch(fetchRequest).then(
                function(response) {
                // If we do not have a valid response, immediately return the error response
                // so that we do not put the bad response into cache
                if (!response || response.status !== 200 || response.type !== 'basic') {
                    return response;
                }

                // IMPORTANT: Clone the response. A response is a stream
                // and because we want the browser to consume the response
                // as well as the cache consuming the response, we need
                // to clone it so we have 2 stream.
                var responseToCache = response.clone();

                // Place the request response within the cache
                caches.open(CACHE_NAME)
                .then(function(cache) {
                    if(event.request.method !== "POST")
                    {
                        cache.put(event.request, responseToCache);
                    }
                });

                return response;
            }
            );
        })
    );
});
JavaScript/Firefox: "Failed to register/update ServiceWorker", when nothing called ServiceWorker is in use

JavaScript/Firefox: "Failed to register/update ServiceWorker", when nothing called ServiceWorker is in use


By : Joe Badalamenti
Date : March 29 2020, 07:55 AM
I wish this helpful for you Type about:debugging#workers in Firefox bar. Find Service Worker for localhost and click unregister. It should helps if it is really leftover.
What it is?
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