cached | Fired after the first cache of the manifest. |
checking | Checking for an update. Always the first event fired in the sequence. |
downloading | An update was found. The browser is fetching resources. |
error | The manifest returns 404 or 410, the download failed or the manifest changed while the download was in progress. |
noupdate | Fired after the first download of the manifest. |
obsolete | Fired if the manifest file returns a 404 or 410. |
progress | Fired for each resource listed in the manifest as it is being fetched. |
updateready | Fired when the manifest resources have been newly redownloaded. |