onchecking

Summary

The user agent is checking for an update, or attempting to download the manifest for the first time. This is always the first event in the sequence.

Property of apis/appcache/ApplicationCacheapis/appcache/ApplicationCache

Syntax

var result = window.applicationCache.onchecking;
window.applicationCache.onchecking = value;

Return Value

Returns an object of type nullnull

Notes

If more than one event is triggered and the checking event is included, the next events may include noupdate, downloading, obsolete, or error. Alternatively, you could use an anonymous delegate function such as

object.onchecking = function (e) { … }

where e is the cached event.

Related specifications

W3C ApplicationCache Specification

W3C Editor’s Draft

Attributions

• Microsoft Developer Network: Article