PerformanceResourceTiming.nextHopProtocol

The nextHopProtocol read-only property is a string representing the network protocol used to fetch the resource, as identified by the ALPN Protocol ID (RFC7301).

When a proxy is used, if a tunnel connection is established, this property returns the ALPN Protocol ID of the tunneled protocol. Otherwise, this property returns the ALPN Protocol ID of the first hop to the proxy.

Note: This feature is available in Web Workers.

Syntax

resource.nextHopProtocol;

Return value

A string representing the network protocol used to fetch the resource, as identified by the ALPN Protocol ID (RFC7301).

Example

The following example uses the nextHopProtocol property.

function print_PerformanceEntries() {
  // Use getEntriesByType() to just get the "resource" events
  var p = performance.getEntriesByType("resource");
  for (var i=0; i < p.length; i++) {
    print_nextHopProtocol(p[i]);
  }
}
function print_nextHopProtocol(perfEntry) {
  var value = "nextHopProtocol" in perfEntry;
  if (value)
    console.log("nextHopProtocol = " + perfEntry.nextHopProtocol);
  else
    console.log("nextHopProtocol = NOT supported");
}

Specifications

Specification Status Comment
Resource Timing Level 1
The definition of 'nextHopProtocol' in that specification.
Candidate Recommendation Initial definition.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome Full support 61Edge Full support 17Firefox Full support 51IE No support NoOpera No support NoSafari No support NoWebView Android Full support 61Chrome Android Full support 61Edge Mobile Full support 17Firefox Android No support NoOpera Android No support NoSafari iOS No support NoSamsung Internet Android No support No

Legend

Full support  
Full support
No support  
No support

Document Tags and Contributors

Last updated by: ExE-Boss,