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BackgroundFetchRegistration: downloaded property - Web APIs

BackgroundFetchRegistration: downloaded property

Limited availability

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

Note: This feature is available in Web Workers.

The downloaded read-only property of the BackgroundFetchRegistration interface returns the size in bytes that has been downloaded, initially 0.

If the value of this property changes, the progress event is fired at the associated BackgroundFetchRegistration object.

Value

A number.

Examples

Logging this property to the console returns the number of bytes downloaded.

console.log(bgFetch.downloaded);
Specifications Browser compatibility

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