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NetworkInformation: downlink property

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

The downlink read-only property of the NetworkInformation interface returns the effective bandwidth estimate in megabits per second, rounded to the nearest multiple of 25 kilobits per seconds. This value is based on recently observed application layer throughput across recently active connections, excluding connections made to a private address space. In the absence of recent bandwidth measurement data, the attribute value is determined by the properties of the underlying connection technology.

Value

A number.

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
downlink
61The value is never greater than 10 Mbps, as a non-standard anti-fingerprinting measure.
79The value is never greater than 10 Mbps, as a non-standard anti-fingerprinting measure.
No No
48The value is never greater than 10 Mbps, as a non-standard anti-fingerprinting measure.
No
50The value is never greater than 10 Mbps, as a non-standard anti-fingerprinting measure.
38The value is never greater than 10 Mbps, as a non-standard anti-fingerprinting measure.
No
25The value is never greater than 10 Mbps, as a non-standard anti-fingerprinting measure.
No
3.0The value is never greater than 10 Mbps, as a non-standard anti-fingerprinting measure.

See also

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https://developer.mozilla.org/en-US/docs/Web/API/NetworkInformation/downlink