next
Version:
The React Framework
34 lines (33 loc) • 1.46 kB
JavaScript
/**
* Logs information about a completed HMR to the console, the server (via a
* `client-hmr-latency` event), and to `self.__NEXT_HMR_LATENCY_CB` (a debugging
* hook).
*
* @param hasUpdate Set this to `false` to avoid reporting the HMR event via a
* `client-hmr-latency` event or to `self.__NEXT_HMR_LATENCY_CB`. Used by
* turbopack when we must report a message to the browser console (because we
* already logged a "rebuilding" message), but it's not a real HMR, so we
* don't want to impact our telemetry.
*/ export default function reportHmrLatency(sendMessage, updatedModules, startMsSinceEpoch, endMsSinceEpoch, hasUpdate) {
if (hasUpdate === void 0) hasUpdate = true;
const latencyMs = endMsSinceEpoch - startMsSinceEpoch;
console.log("[Fast Refresh] done in " + latencyMs + "ms");
if (!hasUpdate) {
return;
}
sendMessage(JSON.stringify({
event: 'client-hmr-latency',
id: window.__nextDevClientId,
startTime: startMsSinceEpoch,
endTime: endMsSinceEpoch,
page: window.location.pathname,
updatedModules,
// Whether the page (tab) was hidden at the time the event occurred.
// This can impact the accuracy of the event's timing.
isPageHidden: document.visibilityState === 'hidden'
}));
if (self.__NEXT_HMR_LATENCY_CB) {
self.__NEXT_HMR_LATENCY_CB(latencyMs);
}
}
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