next/dist/client/performance-relayer.js

The React Framework

"use strict";
Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.default = void 0;
var _webVitals = require("next/dist/compiled/web-vitals");
const initialHref = location.href;
let isRegistered = false;
let userReportHandler;
function onReport(metric) {
    if (userReportHandler) {
        userReportHandler(metric);
    }
    // This code is not shipped, executed, or present in the client-side
    // JavaScript bundle unless explicitly enabled in your application.
    //
    // When this feature is enabled, we'll make it very clear by printing a
    // message during the build (`next build`).
    if (process.env.NODE_ENV === 'production' && // This field is empty unless you explicitly configure it:
    process.env.__NEXT_ANALYTICS_ID) {
        const body = {
            dsn: process.env.__NEXT_ANALYTICS_ID,
            id: metric.id,
            page: window.__NEXT_DATA__.page,
            href: initialHref,
            event_name: metric.name,
            value: metric.value.toString(),
            speed: 'connection' in navigator && navigator['connection'] && 'effectiveType' in navigator['connection'] ? navigator['connection']['effectiveType'] : ''
        };
        const blob = new Blob([
            new URLSearchParams(body).toString()
        ], {
            // This content type is necessary for `sendBeacon`:
            type: 'application/x-www-form-urlencoded'
        });
        const vitalsUrl = 'https://vitals.vercel-insights.com/v1/vitals';
        // Navigator has to be bound to ensure it does not error in some browsers
        // https://xgwang.me/posts/you-may-not-know-beacon/#it-may-throw-error%2C-be-sure-to-catch
        const send = navigator.sendBeacon && navigator.sendBeacon.bind(navigator);
        function fallbackSend() {
            fetch(vitalsUrl, {
                body: blob,
                method: 'POST',
                credentials: 'omit',
                keepalive: true
            }).catch(console.error);
        }
        try {
            // If send is undefined it'll throw as well. This reduces output code size.
            send(vitalsUrl, blob) || fallbackSend();
        } catch (err) {
            fallbackSend();
        }
    }
}
var _default = (onPerfEntry)=>{
    // Update function if it changes:
    userReportHandler = onPerfEntry;
    // Only register listeners once:
    if (isRegistered) {
        return;
    }
    isRegistered = true;
    (0, _webVitals).onCLS(onReport);
    (0, _webVitals).onFID(onReport);
    (0, _webVitals).onFCP(onReport);
    (0, _webVitals).onLCP(onReport);
    (0, _webVitals).onTTFB(onReport);
    (0, _webVitals).onINP(onReport);
};
exports.default = _default;

if ((typeof exports.default === 'function' || (typeof exports.default === 'object' && exports.default !== null)) && typeof exports.default.__esModule === 'undefined') {
  Object.defineProperty(exports.default, '__esModule', { value: true });
  Object.assign(exports.default, exports);
  module.exports = exports.default;
}

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