Function registerValidSW

packages/ui/src/serviceWorker.js:21–62

(swUrl, config)

)

function registerValidSW(swUrl, config) {
    navigator.serviceWorker
        .register(swUrl)
        .then((registration) => {
            registration.onupdatefound = () => {
                const installingWorker = registration.installing
                if (installingWorker == null) {
                    return
                }
                installingWorker.onstatechange = () => {
                    if (installingWorker.state === 'installed') {
                        if (navigator.serviceWorker.controller) {
                            // At this point, the updated precached content has been fetched,
                            // but the previous service worker will still serve the older
                            // content until all client tabs are closed.
                            console.info(
                                'New content is available and will be used when all tabs for this page are closed. See https://bit.ly/CRA-PWA.'
                            )

                            // Execute callback
                            if (config && config.onUpdate) {
                                config.onUpdate(registration)
                            }
                        } else {
                            // At this point, everything has been precached.
                            // It's the perfect time to display a
                            // "Content is cached for offline use." message.
                            console.info('Content is cached for offline use.')

                            // Execute callback
                            if (config && config.onSuccess) {
                                config.onSuccess(registration)
                            }
                        }
                    }
                }
            }
        })
        .catch((error) => {
            console.error('Error during service worker registration:', error)
        })
}

function checkValidServiceWorker(swUrl, config) {
    // Check if the service worker can be found. If it can't reload the page.