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Ignore TTFB for loads where responseStart is zero #281

Merged
merged 2 commits into from
Nov 14, 2022
Merged

Ignore TTFB for loads where responseStart is zero #281

merged 2 commits into from
Nov 14, 2022

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philipwalton
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This PR fixes #275 by ignoring loads where the responseStart property of the navigation entry is 0. The assumption is that responseStart should never be zero unless the browser is intentionally concealing navigation timing data.

philipwalton
philipwalton commented Nov 14, 2022
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src/onTTFB.ts Outdated

// In some cases the value reported is negative or is larger
// than the current page time. Ignore these cases:
// https://github.com/GoogleChrome/web-vitals/issues/137
// https://github.com/GoogleChrome/web-vitals/issues/162
if (metric.value < 0 || metric.value > performance.now()) return;
if (responseStart < 0 || responseStart > performance.now()) return;
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Note, I revert this to using responseStart instead of metric.value because metric.value is being clamped at 0 above, which makes this check mostly useless now. Using responseStart reverts the logic to what it was originally trying to check.

tunetheweb
tunetheweb reviewed Nov 14, 2022
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src/onTTFB.ts Outdated Show resolved Hide resolved
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Ok, updated and rebased to pick up the latest changes on main.

@philipwalton philipwalton merged commit f009cd2 into main Nov 14, 2022
@philipwalton philipwalton deleted the xo-response-start branch November 14, 2022 19:19
@tunetheweb tunetheweb mentioned this pull request Feb 3, 2023
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@lisr lisr mentioned this pull request May 24, 2023
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@sethulakshmi-pm sethulakshmi-pm mentioned this pull request Oct 10, 2023
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zemnmez-renovate-bot added a commit to zemn-me/monorepo that referenced this pull request Oct 5, 2024
@zemnmez-renovate-bot
fix(deps): update dependency web-vitals to v4
b07a342 
##### [`v4.2.3](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v423-2024-08-06)

-   Fix missing LoAF entries in INP attribution ([#512](GoogleChrome/web-vitals#512))
##### [`v4.2.2](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v422-2024-07-17)

-   Fix interaction count after bfcache restore ([#505](GoogleChrome/web-vitals#505))
##### [`v4.2.1](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v421-2024-06-30)

-   Fix compatibility issues with TypeScript v5.5 ([#497](GoogleChrome/web-vitals#497))
##### [`v4.2.0](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v420-2024-06-20)

-   Refactor INP attribution code to fix errors on Windows 10 ([#495](GoogleChrome/web-vitals#495))
##### [`v4.1.1](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v411-2024-06-10)

-   Fix pending LoAF cleanup logic ([#493](GoogleChrome/web-vitals#493))
##### [`v4.1.0](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v410-2024-06-06)

-   Move the support check to the top of the onINP() function ([#490](GoogleChrome/web-vitals#490))
-   Fix missing LoAF attribution when entries are dispatched before event entries ([#487](GoogleChrome/web-vitals#487))
##### [`v4.0.1](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v401-2024-05-21)

-   Add the `ReportCallback` type back but deprecate it ([#483](GoogleChrome/web-vitals#483))
##### [`v4.0.0](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v400-2024-05-13)

-   **\[BREAKING]** Update types to support more generic usage ([#471](GoogleChrome/web-vitals#471))
-   **\[BREAKING]** Split `waitingDuration` to make it easier to understand redirect delays ([#458](GoogleChrome/web-vitals#458))
-   **\[BREAKING]** Rename `TTFBAttribution` fields from `*Time` to `*Duration` ([#453](GoogleChrome/web-vitals#453))
-   **\[BREAKING]** Rename `resourceLoadTime` to `resourceLoadDuration` in LCP attribution ([#450](GoogleChrome/web-vitals#450))
-   **\[BREAKING]** Add INP breakdown timings and LoAF attribution ([#442](GoogleChrome/web-vitals#442))
-   **\[BREAKING]** Deprecate `onFID()` and remove previously deprecated APIs ([#435](GoogleChrome/web-vitals#435))
-   Expose the target element in INP attribution ([#479](GoogleChrome/web-vitals#479))
-   Save INP target after interactions to reduce null values when removed from the DOM ([#477](GoogleChrome/web-vitals#477))
-   Cap TTFB in attribution ([#440](GoogleChrome/web-vitals#440))
-   Fix `reportAllChanges` behavior for LCP when library is loaded late ([#468](GoogleChrome/web-vitals#468))
##### [`v3.5.2](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v352-2024-01-25)

-   Pick the first non-null `target` for INP attribution ([#421](GoogleChrome/web-vitals#421))
##### [`v3.5.1](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v351-2023-12-27)

-   Add extra guard for `PerformanceEventTiming` not existing ([#403](GoogleChrome/web-vitals#403))
##### [`v3.5.0](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v350-2023-09-28)

-   Run `onLCP` callback in separate task ([#386](GoogleChrome/web-vitals#386))
-   Fix INP durationThreshold bug when set to 0 ([#372](GoogleChrome/web-vitals#372))
-   Prevent FID entries being emitted as INP for non-supporting browsers ([#368](GoogleChrome/web-vitals#368))
##### [`v3.4.0](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v340-2023-07-11)

-   Make `bindReporter` generic over metric type ([#359](GoogleChrome/web-vitals#359))
-   Update INP status in README ([#362](GoogleChrome/web-vitals#362))
-   Fix Metric types for better TypeScript support ([#356](GoogleChrome/web-vitals#356))
-   Fix selector for SVGs for attribution build ([#354](GoogleChrome/web-vitals#354))
##### [`v3.3.2](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v332-2023-05-29)

-   Fix attribution types ([#348](GoogleChrome/web-vitals#348))
-   Safe access navigation entry type ([#290](GoogleChrome/web-vitals#290))
##### [`v3.3.1](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v331-2023-04-04)

-   Export metric rating thresholds in attribution build as well.
##### [`v3.3.0](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v330-2023-03-09)

-   Export metric rating thresholds, add explicit `MetricRatingThresholds` type ([#323](GoogleChrome/web-vitals#323))
-   Trim classname selector ([#328](GoogleChrome/web-vitals#328))
-   Add link to CrUX versus RUM blog post ([#327](GoogleChrome/web-vitals#327))
-   Prevent LCP being reported for hidden prerendered pages ([#326](GoogleChrome/web-vitals#326))
-   Add Server Timing information to docs ([#324](GoogleChrome/web-vitals#324))
-   Fix link in `onINP()` thresholds comment ([#318](GoogleChrome/web-vitals#318))
-   Update web.dev link for `onINP()` ([#307](GoogleChrome/web-vitals#307))
-   Add a note about when to load the library ([#305](GoogleChrome/web-vitals#305))
##### [`v3.1.1](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v311-2023-01-10)

-   Defer CLS logic until after `onFCP()` callback ([#297](GoogleChrome/web-vitals#297))
##### [`v3.1.0](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v310-2022-11-15)

-   Add support for `'restore'` as a `navigationType` ([#284](GoogleChrome/web-vitals#284))
-   Report initial CLS value when `reportAllChanges` is true ([#283](GoogleChrome/web-vitals#283))
-   Defer all observers until after activation ([#282](GoogleChrome/web-vitals#282))
-   Ignore TTFB for loads where responseStart is zero ([#281](GoogleChrome/web-vitals#281))
-   Defer execution of observer callbacks ([#278](GoogleChrome/web-vitals#278))
##### [`v3.0.4](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v304-2022-10-18)

-   Clamp LCP and FCP to 0 for prerendered pages ([#270](GoogleChrome/web-vitals#270))
##### [`v3.0.3](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v303-2022-10-04)

-   Ensure `attribution` object is always present in attribution build ([#265](GoogleChrome/web-vitals#265))
##### [`v3.0.2](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v302-2022-09-14)

-   Set an explicit unpkg dist file ([#261](GoogleChrome/web-vitals#261))
##### [`v3.0.1](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v301-2022-08-31)

-   Use the cjs extension for all UMD builds ([#257](GoogleChrome/web-vitals#257))
##### [`v3.0.0](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v300-2022-08-24)

-   **\[BREAKING]** Add a config object param to all metric functions ([#225](GoogleChrome/web-vitals#225))
-   **\[BREAKING]** Report TTFB after a bfcache restore ([#220](GoogleChrome/web-vitals#220))
-   **\[BREAKING]** Only include last LCP entry in metric entries ([#218](GoogleChrome/web-vitals#218))
-   Update the metric ID prefix for v3 ([#251](GoogleChrome/web-vitals#251))
-   Move the Navigation Timing API polyfill to the base+polyfill build ([#248](GoogleChrome/web-vitals#248))
-   Add a metric rating property ([#246](GoogleChrome/web-vitals#246))
-   Add deprecation notices for base+polyfill builds ([#242](GoogleChrome/web-vitals#242))
-   Add a new attribution build for debugging issues in the field ([#237](GoogleChrome/web-vitals#237), [#244](GoogleChrome/web-vitals#244))
-   Add support for prerendered pages ([#233](GoogleChrome/web-vitals#233))
-   Rename the `ReportHandler` type to `ReportCallback`, with alias for back-compat ([#225](GoogleChrome/web-vitals#225), [#227](GoogleChrome/web-vitals#227))
-   Add support for the new INP metric ([#221](GoogleChrome/web-vitals#221), [#232](GoogleChrome/web-vitals#232))
-   Rename `getXXX()` functions to `onXXX()` ([#222](GoogleChrome/web-vitals#222))
-   Add a `navigationType` property to the Metric object ([#219](GoogleChrome/web-vitals#219))
github-merge-queue bot pushed a commit to zemn-me/monorepo that referenced this pull request Oct 5, 2024
@zemnmez-renovate-bot
fix(deps): update dependency web-vitals to v4
f7232d4 
##### [`v4.2.3](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v423-2024-08-06)

-   Fix missing LoAF entries in INP attribution ([#512](GoogleChrome/web-vitals#512))
##### [`v4.2.2](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v422-2024-07-17)

-   Fix interaction count after bfcache restore ([#505](GoogleChrome/web-vitals#505))
##### [`v4.2.1](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v421-2024-06-30)

-   Fix compatibility issues with TypeScript v5.5 ([#497](GoogleChrome/web-vitals#497))
##### [`v4.2.0](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v420-2024-06-20)

-   Refactor INP attribution code to fix errors on Windows 10 ([#495](GoogleChrome/web-vitals#495))
##### [`v4.1.1](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v411-2024-06-10)

-   Fix pending LoAF cleanup logic ([#493](GoogleChrome/web-vitals#493))
##### [`v4.1.0](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v410-2024-06-06)

-   Move the support check to the top of the onINP() function ([#490](GoogleChrome/web-vitals#490))
-   Fix missing LoAF attribution when entries are dispatched before event entries ([#487](GoogleChrome/web-vitals#487))
##### [`v4.0.1](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v401-2024-05-21)

-   Add the `ReportCallback` type back but deprecate it ([#483](GoogleChrome/web-vitals#483))
##### [`v4.0.0](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v400-2024-05-13)

-   **\[BREAKING]** Update types to support more generic usage ([#471](GoogleChrome/web-vitals#471))
-   **\[BREAKING]** Split `waitingDuration` to make it easier to understand redirect delays ([#458](GoogleChrome/web-vitals#458))
-   **\[BREAKING]** Rename `TTFBAttribution` fields from `*Time` to `*Duration` ([#453](GoogleChrome/web-vitals#453))
-   **\[BREAKING]** Rename `resourceLoadTime` to `resourceLoadDuration` in LCP attribution ([#450](GoogleChrome/web-vitals#450))
-   **\[BREAKING]** Add INP breakdown timings and LoAF attribution ([#442](GoogleChrome/web-vitals#442))
-   **\[BREAKING]** Deprecate `onFID()` and remove previously deprecated APIs ([#435](GoogleChrome/web-vitals#435))
-   Expose the target element in INP attribution ([#479](GoogleChrome/web-vitals#479))
-   Save INP target after interactions to reduce null values when removed from the DOM ([#477](GoogleChrome/web-vitals#477))
-   Cap TTFB in attribution ([#440](GoogleChrome/web-vitals#440))
-   Fix `reportAllChanges` behavior for LCP when library is loaded late ([#468](GoogleChrome/web-vitals#468))
##### [`v3.5.2](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v352-2024-01-25)

-   Pick the first non-null `target` for INP attribution ([#421](GoogleChrome/web-vitals#421))
##### [`v3.5.1](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v351-2023-12-27)

-   Add extra guard for `PerformanceEventTiming` not existing ([#403](GoogleChrome/web-vitals#403))
##### [`v3.5.0](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v350-2023-09-28)

-   Run `onLCP` callback in separate task ([#386](GoogleChrome/web-vitals#386))
-   Fix INP durationThreshold bug when set to 0 ([#372](GoogleChrome/web-vitals#372))
-   Prevent FID entries being emitted as INP for non-supporting browsers ([#368](GoogleChrome/web-vitals#368))
##### [`v3.4.0](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v340-2023-07-11)

-   Make `bindReporter` generic over metric type ([#359](GoogleChrome/web-vitals#359))
-   Update INP status in README ([#362](GoogleChrome/web-vitals#362))
-   Fix Metric types for better TypeScript support ([#356](GoogleChrome/web-vitals#356))
-   Fix selector for SVGs for attribution build ([#354](GoogleChrome/web-vitals#354))
##### [`v3.3.2](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v332-2023-05-29)

-   Fix attribution types ([#348](GoogleChrome/web-vitals#348))
-   Safe access navigation entry type ([#290](GoogleChrome/web-vitals#290))
##### [`v3.3.1](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v331-2023-04-04)

-   Export metric rating thresholds in attribution build as well.
##### [`v3.3.0](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v330-2023-03-09)

-   Export metric rating thresholds, add explicit `MetricRatingThresholds` type ([#323](GoogleChrome/web-vitals#323))
-   Trim classname selector ([#328](GoogleChrome/web-vitals#328))
-   Add link to CrUX versus RUM blog post ([#327](GoogleChrome/web-vitals#327))
-   Prevent LCP being reported for hidden prerendered pages ([#326](GoogleChrome/web-vitals#326))
-   Add Server Timing information to docs ([#324](GoogleChrome/web-vitals#324))
-   Fix link in `onINP()` thresholds comment ([#318](GoogleChrome/web-vitals#318))
-   Update web.dev link for `onINP()` ([#307](GoogleChrome/web-vitals#307))
-   Add a note about when to load the library ([#305](GoogleChrome/web-vitals#305))
##### [`v3.1.1](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v311-2023-01-10)

-   Defer CLS logic until after `onFCP()` callback ([#297](GoogleChrome/web-vitals#297))
##### [`v3.1.0](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v310-2022-11-15)

-   Add support for `'restore'` as a `navigationType` ([#284](GoogleChrome/web-vitals#284))
-   Report initial CLS value when `reportAllChanges` is true ([#283](GoogleChrome/web-vitals#283))
-   Defer all observers until after activation ([#282](GoogleChrome/web-vitals#282))
-   Ignore TTFB for loads where responseStart is zero ([#281](GoogleChrome/web-vitals#281))
-   Defer execution of observer callbacks ([#278](GoogleChrome/web-vitals#278))
##### [`v3.0.4](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v304-2022-10-18)

-   Clamp LCP and FCP to 0 for prerendered pages ([#270](GoogleChrome/web-vitals#270))
##### [`v3.0.3](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v303-2022-10-04)

-   Ensure `attribution` object is always present in attribution build ([#265](GoogleChrome/web-vitals#265))
##### [`v3.0.2](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v302-2022-09-14)

-   Set an explicit unpkg dist file ([#261](GoogleChrome/web-vitals#261))
##### [`v3.0.1](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v301-2022-08-31)

-   Use the cjs extension for all UMD builds ([#257](GoogleChrome/web-vitals#257))
##### [`v3.0.0](https://github.com/GoogleChrome/web-vitals/blob/HEAD/CHANGELOG.md#v300-2022-08-24)

-   **\[BREAKING]** Add a config object param to all metric functions ([#225](GoogleChrome/web-vitals#225))
-   **\[BREAKING]** Report TTFB after a bfcache restore ([#220](GoogleChrome/web-vitals#220))
-   **\[BREAKING]** Only include last LCP entry in metric entries ([#218](GoogleChrome/web-vitals#218))
-   Update the metric ID prefix for v3 ([#251](GoogleChrome/web-vitals#251))
-   Move the Navigation Timing API polyfill to the base+polyfill build ([#248](GoogleChrome/web-vitals#248))
-   Add a metric rating property ([#246](GoogleChrome/web-vitals#246))
-   Add deprecation notices for base+polyfill builds ([#242](GoogleChrome/web-vitals#242))
-   Add a new attribution build for debugging issues in the field ([#237](GoogleChrome/web-vitals#237), [#244](GoogleChrome/web-vitals#244))
-   Add support for prerendered pages ([#233](GoogleChrome/web-vitals#233))
-   Rename the `ReportHandler` type to `ReportCallback`, with alias for back-compat ([#225](GoogleChrome/web-vitals#225), [#227](GoogleChrome/web-vitals#227))
-   Add support for the new INP metric ([#221](GoogleChrome/web-vitals#221), [#232](GoogleChrome/web-vitals#232))
-   Rename `getXXX()` functions to `onXXX()` ([#222](GoogleChrome/web-vitals#222))
-   Add a `navigationType` property to the Metric object ([#219](GoogleChrome/web-vitals#219))
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TTFB (under)reporting 0ms on Safari + utm/gclid params
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@philipwalton @tunetheweb