NetworkInformation: downlinkMax property
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 downlinkMax
read-only property of the NetworkInformation
interface returns the maximum downlink speed, in megabits per second (Mbps), for the underlying connection technology.
Value
An number 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.
js
function logConnectionType() {
let connectionType = "not supported";
let 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 |
---|
Network Information API # dom-networkinformation-downlinkmax |
Browser compatibility
BCD tables only load in the browser