Experimental
This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The NetworkInformation.downlinkMax
read-only property
returns the maximum downlink speed, in megabits per second (Mbps), for the underlying
connection technology.
Note:
This feature is available in Web Workers.Syntax
var max = NetworkInformation.downlinkMax
Return value
- an
unrestricted double
representing the maximum downlink speed, in megabits per second (Mb/s), for the underlying connection technology.
Examples
The following example monitors the connection using the change
event and
logs changes as they occur.
function logConnectionType() {
var connectionType = 'not supported';
var downlinkMax = 'not supported';
if ('connection' in navigator) {
connectionType = navigator.connection.effectiveType;
if ('downlinkMax' in navigator.connection) {
downlinkMax = navigator.connection.downlinkMax;
}
}
console.log('Current connection type: ' + connectionType +
' (downlink max: ' + downlinkMax + ')');
}
logConnectionType();
navigator.connection.addEventListener('change', logConnectionType);
Specifications
Specification | Status | Comment |
---|---|---|
Network Information API The definition of 'downlinkMax' in that specification. |
Draft | Initial definition |
Browser compatibility
BCD tables only load in the browser