feat/fix(tracker):4.1.8:recalculate timeOrigin on start

tracker/tracker/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@openreplay/tracker",
   "description": "The OpenReplay tracker main package",
-  "version": "4.1.7",
+  "version": "4.1.8",
   "keywords": [
     "logging",
     "replay"

tracker/tracker/src/main/app/index.ts

@@ -1,6 +1,6 @@
 import type Message from './messages.gen.js'
 import { Timestamp, Metadata, UserID } from './messages.gen.js'
-import { now, deprecationWarn } from '../utils.js'
+import { now, adjustTimeOrigin, deprecationWarn } from '../utils.js'
 import Nodes from './nodes.js'
 import Observer from './observer/top_observer.js'
 import Sanitizer from './sanitizer.js'
@@ -369,6 +369,7 @@ export default class App {
       this.sessionStorage.removeItem(this.options.session_reset_key)
     }
   }
+
   private _start(startOpts: StartOptions = {}, resetByWorker = false): Promise<StartPromiseReturn> {
     if (!this.worker) {
       return Promise.resolve(UnsuccessfulStart('No worker found: perhaps, CSP is not set.'))
@@ -381,6 +382,7 @@ export default class App {
       )
     }
     this.activityState = ActivityState.Starting
+    adjustTimeOrigin()
 
     if (startOpts.sessionHash) {
       this.session.applySessionHash(startOpts.sessionHash)

tracker/tracker/src/main/modules/timing.ts

@@ -226,13 +226,13 @@ export default function (app: App, opts: Partial<Options>): void {
           paintBlocks === null
             ? 0
             : calculateSpeedIndex(firstContentfulPaint || firstPaint, paintBlocks)
+        const { domContentLoadedEventEnd, navigationStart } = performance.timing
         const timeToInteractive =
           interactiveWindowTickTime === null
             ? Math.max(
                 interactiveWindowStartTime,
                 firstContentfulPaint,
-                performance.timing.domContentLoadedEventEnd - performance.timing.navigationStart ||
+                domContentLoadedEventEnd - navigationStart || 0,
-                  0,
               )
             : 0
         app.send(

tracker/tracker/src/main/modules/viewport.ts

@@ -1,9 +1,10 @@
 import type App from '../app/index.js'
+import { getTimeOrigin } from '../utils.js'
 import { SetPageLocation, SetViewportSize, SetPageVisibility } from '../app/messages.gen.js'
 
 export default function (app: App): void {
   let url: string, width: number, height: number
-  let navigationStart = performance.timing.navigationStart
+  let navigationStart: number
 
   const sendSetPageLocation = app.safe(() => {
     const { URL } = document
@@ -30,6 +31,7 @@ export default function (app: App): void {
 
   app.attachStartCallback(() => {
     url = ''
+    navigationStart = getTimeOrigin()
     width = height = -1
     sendSetPageLocation()
     sendSetViewportSize()

tracker/tracker/src/main/utils.ts

@@ -6,12 +6,19 @@ export const IS_FIREFOX = IN_BROWSER && navigator.userAgent.match(/firefox|fxios
 
 export const MAX_STR_LEN = 1e5
 
-const navigationStart: number | false =
+// Buggy to use `performance.timeOrigin || performance.timing.navigationStart`
-  IN_BROWSER && (performance.timing.navigationStart || performance.timeOrigin)
+// https://github.com/mdn/content/issues/4713
-// performance.now() is buggy in some browsers
+// Maybe move to timer/ticker
+let timeOrigin: number = IN_BROWSER ? Date.now() - performance.now() : 0
+export function adjustTimeOrigin() {
+  timeOrigin = Date.now() - performance.now()
+}
+export function getTimeOrigin() {
+  return timeOrigin
+}
 export const now: () => number =
-  IN_BROWSER && performance.now() && navigationStart
+  IN_BROWSER && !!performance.now
-    ? () => Math.round(performance.now() + navigationStart)
+    ? () => Math.round(performance.now() + timeOrigin)
     : () => Date.now()
 
 export const stars: (str: string) => string =