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 2 The definition of 'nextHopProtocol' in that specification. |
Working Draft | Initial definition. |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
nextHopProtocol | Chrome Full support 61 | Edge Full support 17 | Firefox Full support 45 | IE No support No | Opera No support No | Safari No support No | WebView Android Full support 61 | Chrome Android Full support 61 | Firefox Android Full support 45 | Opera Android No support No | Safari iOS No support No | Samsung Internet Android Full support 8.0 |
Legend
- Full support
- Full support
- No support
- No support