BackgroundFetchRegistration:downloadTotal 属性
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
备注: 此特性在 Web Worker 中可用。
BackgroundFetchRecord
接口的只读属性 downloadTotal
返回此下载的总大小(以字节为单位)。该值在注册后台获取时设置,如果未设置则为 0
。