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The nextHopProtocol
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.
This property is Read only .
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 The definition of 'nextHopProtocol' in that specification. |
Editor's Draft | Initial definition. |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support. | No support | No support | No support | No support | No support |
Feature | Android | Firefox Mobile (Gecko) | Firefox OS | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support. | No support | No support | No support | No support | No support | No support |