Function checkValidServiceWorker

javascript/grid-ui/src/serviceWorker.ts:121–149

(swUrl, config)

}

function checkValidServiceWorker (swUrl, config) {
  // Check if the service worker can be found. If it can't reload the page.
  window.fetch(swUrl, {
    headers: { 'Service-Worker': 'script' }
  })
    .then(response => {
      // Ensure service worker exists, and that we really are getting a JS file.
      const contentType = response.headers.get('content-type')
      if (
        response.status === 404 ||
        (contentType != null && !contentType.includes('javascript'))
      ) {
        // 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, config)
      }
    })
    .catch(() => {
      console.log(
        'No internet connection found. App is running in offline mode.'
      )
    })
}

export function unregister () {
  if ('serviceWorker' in navigator) {