I am totally new to service-workers! I am having a react site running in the localhost and about to be deployed. I am following the code specified here.
const isLocalhost = Boolean(
window.location.hostname === 'localhost' ||
// [::1] is the IPv6 localhost address.
window.location.hostname === '[::1]' ||
// 127.0.0.1/8 is considered localhost for IPv4.
window.location.hostname.match(
/^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
)
)
export default function register () {
if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
// The URL constructor is available in all browsers that support SW.
const publicUrl = new URL(process.env.PUBLIC_URL, window.location)
if (publicUrl.origin !== window.location.origin) {
// Our service worker won't work if PUBLIC_URL is on a different origin
// from what our page is served on. This might happen if a CDN is used to
// serve assets; see https://github.com/facebookincubator/create-react-app/issues/2374
return
}
window.addEventListener('load', () => {
const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`
if (!isLocalhost) {
// Is not local host. Just register service worker
registerValidSW(swUrl)
} else {
// This is running on localhost. Lets check if a service worker still exists or not.
checkValidServiceWorker(swUrl)
}
})
}
}
function registerValidSW (swUrl) {
navigator.serviceWorker
.register(swUrl)
.then(registration => {
registration.onupdatefound = () => {
const installingWorker = registration.installing
installingWorker.onstatechange = () => {
if (installingWorker.state === 'installed') {
if (navigator.serviceWorker.controller) {
// At this point, the old content will have been purged and
// the fresh content will have been added to the cache.
// It's the perfect time to display a "New content is
// available; please refresh." message in your web app.
console.log('New content is available; please refresh.')
} else {
// At this point, everything has been precached.
// It's the perfect time to display a
// "Content is cached for offline use." message.
console.log('Content is cached for offline use.')
}
}
}
}
})
.catch(error => {
console.error('Error during service worker registration:', error)
})
}
function checkValidServiceWorker (swUrl) {
// Check if the service worker can be found. If it can't reload the page.
fetch(swUrl)
.then(response => {
// Ensure service worker exists, and that we really are getting a JS file.
if (
response.status === 404 ||
response.headers.get('content-type').indexOf('javascript') === -1
) {
// No service worker found. Probably a different app. Reload the page.
navigator.serviceWorker.ready.then(registration => {
registration.unregister().then(() => {
window.location.reload()
})
})
} else {
// Service worker found. Proceed as normal.
registerValidSW(swUrl)
}
})
.catch(() => {
console.log(
'No internet connection found. App is running in offline mode.'
)
})
}
export function unregister () {
if ('serviceWorker' in navigator) {
navigator.serviceWorker.ready.then(registration => {
registration.unregister()
})
}
}
This only works in Production but, I want the offline-site to run in the localhost
and also cache only the base route ie /
. I don't want to cache any other pages.
Any help is greatly appreciated !
Thanks!
from Offline Pages with Service-Worker React
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