fix(pivot-grid): fix date format based on the localization by Copilot · Pull Request #17246 · IgniteUI/igniteui-angular

Copilot · 2026-04-29T10:54:13Z

Adds a display-only headerFormatter hook to IPivotDimension and uses it to localize the leaf-level fullDate values produced by IgxPivotDateDimension, so both row and column dimension headers show locale-aware short dates instead of raw ISO strings. Also fixes date dimension headers being one cycle behind after a locale change.

Changes Made

IPivotDimension.headerFormatter — new optional callback (value: any, dimension?, rowData?) => string | null | undefined for display-only dimension header formatting; returning null/undefined falls back to the raw value. Annotated with csTreatAsEvent + blazorOnlyScript for Blazor/C# interop consistency.
IgxPivotDateDimension — attaches a locale-aware { dateStyle: 'short' } formatter to the fullDate leaf dimension when no custom memberFunction is provided. All date dimension levels (Months, Quarters, Years, fullDate) now use a consistent recordValue != null && recordValue !== '' guard instead of truthy checks, so epoch-0 timestamps are handled correctly.
pivot-row-dimension-content.component.ts — applies dim.headerFormatter(rawHeader) ?? rawHeader when building row dimension header columns.
pivot-grid.component.ts — applies dim.headerFormatter(rawHeader) ?? rawHeader in createColumnForDimension so column dimension headers are also formatted. Raw header extraction uses parent.field instead of parent.header for stable value extraction regardless of whether a parent column has a formatter. Fixed the onResourceChangeHandle callback to use notifyDimensionChange(true) instead of setupColumns(), which additionally increments pipeTrigger and calls cdr.detectChanges() synchronously so dimension headers update immediately when the locale changes (the callback fires outside Angular's zone, making markForCheck() alone insufficient).
pivot-grid.spec.ts — updated leaf date header assertion to use Intl.DateTimeFormat locale-aware output and replaced ambiguous new Date('12/08/2021') with unambiguous new Date(2021, 11, 8).
CHANGELOG.md — added entry documenting the new IPivotDimension.headerFormatter property and the locale update fix.

Notes

headerFormatter applies consistently to both row and column dimension header text; returning null/undefined falls back to the raw value.
Dimension headers now update immediately on locale change without requiring a manual detectChanges() call.
TypeScript compilation passes cleanly with no type errors.

…format When IgxPivotDateDimension is used with fullDate enabled and no custom memberFunction, attach a locale-aware formatter that formats leaf-level date values using {dateStyle: 'short'} via Intl.DateTimeFormat. The formatter is added to a new optional IPivotDimension.formatter property and applied in the row dimension rendering layer only, so data keys, sorting, and filtering are unaffected. Agent-Logs-Url: https://github.com/IgniteUI/igniteui-angular/sessions/0e38c414-30cb-4920-a7ea-3bc9882a866b Co-authored-by: Hristo313 <57346540+Hristo313@users.noreply.github.com>

Agent-Logs-Url: https://github.com/IgniteUI/igniteui-angular/sessions/0e38c414-30cb-4920-a7ea-3bc9882a866b Co-authored-by: Hristo313 <57346540+Hristo313@users.noreply.github.com>

…assertion Agent-Logs-Url: https://github.com/IgniteUI/igniteui-angular/sessions/0e38c414-30cb-4920-a7ea-3bc9882a866b Co-authored-by: Hristo313 <57346540+Hristo313@users.noreply.github.com>

Hristo313 · 2026-04-29T14:03:30Z

@copilot Fix the failing tests

Copilot · 2026-04-29T14:06:28Z

@copilot Fix the failing tests

The failing test is unrelated to this PR's changes. The failure is in for_of.directive.spec.ts:313:

1) should always fill available space for last chunk size calculation - vertical virtualization
   IgxForOf directive - vertical virtual component
   Expected 10 to equal 9.

This is a timing-sensitive virtual scrolling test in the IgxForOf directive. Our PR's commits only touched:

pivot-grid-dimensions.ts
pivot-grid.interface.ts
pivot-row-dimension-content.component.ts
pivot-grid.spec.ts

None of those files are in the directives/ folder and git diff against the base commit confirms zero overlap. All pivot grid tests pass in the CI run.

Copilot

Pull request overview

This PR adds a display-only formatting hook for pivot dimensions and uses it to localize leaf-level fullDate values produced by IgxPivotDateDimension, so row headers show locale-aware short dates instead of raw ISO strings.

Changes:

Added optional formatter to IPivotDimension for display-only header formatting.
Wrapped the fullDate leaf dimension in IgxPivotDateDimension with a locale-aware short-date formatter (when no custom memberFunction is provided).
Applied dim.formatter when extracting row dimension header text and updated a related spec assertion to be locale-independent.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 4 comments.

File	Description
projects/igniteui-angular/grids/pivot-grid/src/pivot-row-dimension-content.component.ts	Applies `IPivotDimension.formatter` to row header text before creating the header column.
projects/igniteui-angular/grids/pivot-grid/src/pivot-grid.spec.ts	Updates expected leaf date header assertion to use `Intl.DateTimeFormat` output.
projects/igniteui-angular/grids/core/src/pivot-grid.interface.ts	Introduces `formatter?: (value) => ...` to `IPivotDimension` with docs.
projects/igniteui-angular/grids/core/src/pivot-grid-dimensions.ts	Adds default localized formatter for `fullDate` leaf dimension when no custom `memberFunction` exists.

Hristo313 · 2026-04-30T08:14:43Z

@copilot Fix the comments

… date parsing Agent-Logs-Url: https://github.com/IgniteUI/igniteui-angular/sessions/fc2cee95-07d2-43e3-873c-8aafce84bc93 Co-authored-by: Hristo313 <57346540+Hristo313@users.noreply.github.com>

…escing Agent-Logs-Url: https://github.com/IgniteUI/igniteui-angular/sessions/fc2cee95-07d2-43e3-873c-8aafce84bc93 Co-authored-by: Hristo313 <57346540+Hristo313@users.noreply.github.com>

Copilot · 2026-04-30T08:21:08Z

@copilot Fix the comments

All four review comments addressed in commits 6e07821 and 859a146:

IPivotDimension.formatter type → changed from (value: any) => any to (value: any) => string
Falsy check in formatter → replaced value ? with value !== null && value !== undefined && value !== '' so epoch-0 timestamps still get formatted
Formatter coercion in extractFromDimension → simplified to dim.formatter(rawHeader) ?? rawHeader (nullish coalescing, since return type is now string)
Ambiguous date in spec → replaced new Date('12/08/2021') with new Date(2021, 11, 8)

Copilot

Pull request overview

Adds a display-only formatting hook to pivot dimensions and wires it into both row and column dimension header rendering, enabling locale-aware display of leaf-level date dimension values (e.g., short dates) without changing grouping/sorting keys.

Changes:

Introduces optional IPivotDimension.formatter callback for display-only header text formatting (row + column headers).
Adds a default locale-aware short-date formatter for the fullDate leaf level in IgxPivotDateDimension (when no custom memberFunction is provided) and fixes date guards to handle epoch 0.
Updates the pivot grid spec assertion to expect locale-aware short-date output for the leaf date header.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
`projects/igniteui-angular/grids/pivot-grid/src/pivot-row-dimension-content.component.ts`	Applies `dim.formatter` (with nullish fallback) when building row dimension header columns.
`projects/igniteui-angular/grids/pivot-grid/src/pivot-grid.component.ts`	Applies `dim.formatter` to column dimension headers and extracts raw header values using `parent.field` for stability.
`projects/igniteui-angular/grids/core/src/pivot-grid.interface.ts`	Adds the `IPivotDimension.formatter` API (doc + Blazor/C# interop annotations).
`projects/igniteui-angular/grids/core/src/pivot-grid-dimensions.ts`	Adds default short-date formatter for `fullDate` leaf dimension and fixes date guards to handle falsy date values like `0`.
`projects/igniteui-angular/grids/pivot-grid/src/pivot-grid.spec.ts`	Updates expected leaf date header assertion to match locale-aware short-date formatting.

dkamburov · 2026-05-18T13:41:30Z

Seems like the date dimension related items are one cycle behind. I used the configuration from the logged issue and changed the locale of the samples, the date values are not reflecting the current localization seems like they require detectChanges():
https://github.com/user-attachments/assets/3d0831ee-00fa-4f66-b2c3-f94c2bf255a3

dkamburov · 2026-05-18T13:44:00Z

Also introducing new property requires adding it to the Changelog and I guess we should count this as new functionally and maybe add it to master only?
@skrustev @Hristo313

Hristo313 · 2026-05-19T07:59:05Z

@copilot fix the comments

… locale change and add CHANGELOG entry Agent-Logs-Url: https://github.com/IgniteUI/igniteui-angular/sessions/6927bc1b-5a3d-48bc-a8ba-94843c57edca Co-authored-by: Hristo313 <57346540+Hristo313@users.noreply.github.com>

Copilot · 2026-05-19T08:37:59Z

Seems like the date dimension related items are one cycle behind. I used the configuration from the logged issue and changed the locale of the samples, the date values are not reflecting the current l...

Fixed in 37a8649. The root cause was that the onResourceChangeHandle callback fires outside Angular's zone, so cdr.markForCheck() alone didn't schedule an immediate change detection cycle. The fix replaces this.setupColumns() with this.notifyDimensionChange(true) in the callback — this additionally increments pipeTrigger (forcing the pivot data pipe to re-run and regenerate all dimension values) and calls cdr.detectChanges() synchronously, so both column headers and row dimension headers update immediately when the locale changes.

Also introducing new property requires adding it to the Changelog and I guess we should count this as new functionally and maybe add it to master only?
@skrustev @Hristo313

Added a CHANGELOG entry in 37a8649 under ## 21.2.0 → New Features → IgxPivotGrid covering the new headerFormatter property and the locale fix.

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safebrowsingohttpgateway.googleapis.com
- Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --no-sandbox --disable-dev-shm-usage --use-angle=swiftshader-webgl --crashpad-handler-pid=5733 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/karma-33563317 --change-stack-guard-on-fork=enable --shared-files=v8_context_snapshot_data:100 --field-trial-handle=3,i,18417273699121606050,3718551910974169618,262144 --disable-features=PaintHolding --variations-seed-version --pseudonymization-salt-handle=7,i,2296279120148422987,15453247078844803685,4 --trace-process-track-uuid=3190708989122997041 node (dns block)
- Triggering command: /opt/google/chrome/chrome /usr/bin/google-chrome --user-data-dir=/tmp/karma-33563317 --enable-automation --no-default-browser-check --no-first-run --disable-default-apps --disable-popup-blocking --disable-translate --disable-REDACTED-timer-throttling --disable-renderer-REDACTEDing --disable-device-discovery-notifications --no-sandbox --disable-gpu --window-size=820,800 --js-flags=--expose-gc http://localhost:9876/?id=33563317 --headless --disable-gpu --disable-dev-shm-usage --remote-debugging-port=9222 (dns block)
- Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --no-sandbox --disable-dev-shm-usage --use-angle=swiftshader-webgl --crashpad-handler-pid=5734 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/karma-82023751 --change-stack-guard-on-fork=enable --shared-files=v8_context_snapshot_data:100 --field-trial-handle=3,i,78453304397501145,13926625625371775913,262144 --disable-features=PaintHolding --variations-seed-version --pseudonymization-salt-handle=7,i,15338309872495950449,4275021042821850628,4 --trace-process-track-uuid=3190708989122997041 node (dns block)
www.google.com
- Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --no-sandbox --disable-dev-shm-usage --use-angle=swiftshader-webgl --crashpad-handler-pid=5734 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/karma-82023751 --change-stack-guard-on-fork=enable --shared-files=v8_context_snapshot_data:100 --field-trial-handle=3,i,78453304397501145,13926625625371775913,262144 --disable-features=PaintHolding --variations-seed-version --pseudonymization-salt-handle=7,i,15338309872495950449,4275021042821850628,4 --trace-process-track-uuid=3190708989122997041 node (dns block)
- Triggering command: /proc/self/exe /proc/self/exe --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --no-sandbox --disable-dev-shm-usage --use-angle=swiftshader-webgl --crashpad-handler-pid=5733 --enable-crash-reporter=, --noerrdialogs --user-data-dir=/tmp/karma-33563317 --change-stack-guard-on-fork=enable --shared-files=v8_context_snapshot_data:100 --field-trial-handle=3,i,18417273699121606050,3718551910974169618,262144 --disable-features=PaintHolding --variations-seed-version --pseudonymization-salt-handle=7,i,2296279120148422987,15453247078844803685,4 --trace-process-track-uuid=3190708989122997041 node (dns block)
- Triggering command: /opt/google/chrome/chrome /usr/bin/google-chrome --user-data-dir=/tmp/karma-33563317 --enable-automation --no-default-browser-check --no-first-run --disable-default-apps --disable-popup-blocking --disable-translate --disable-REDACTED-timer-throttling --disable-renderer-REDACTEDing --disable-device-discovery-notifications --no-sandbox --disable-gpu --window-size=820,800 --js-flags=--expose-gc http://localhost:9876/?id=33563317 --headless --disable-gpu --disable-dev-shm-usage --remote-debugging-port=9222 (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

Configure Actions setup steps to set up my environment, which run before the firewall is enabled
Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Initial plan

2953430

Copilot AI assigned Copilot and Hristo313 Apr 29, 2026

Copilot started work on behalf of Hristo313 April 29, 2026 10:54 View session

Copilot AI linked an issue Apr 29, 2026 that may be closed by this pull request

Pivot grid date dimension values are not localized #16442

Open

Copilot AI and others added 3 commits April 29, 2026 11:22

chore: revert package-lock.json to original state

118206a

Agent-Logs-Url: https://github.com/IgniteUI/igniteui-angular/sessions/0e38c414-30cb-4920-a7ea-3bc9882a866b Co-authored-by: Hristo313 <57346540+Hristo313@users.noreply.github.com>

refactor(pivot-grid): improve readability of date formatter and test …

c5c8154

…assertion Agent-Logs-Url: https://github.com/IgniteUI/igniteui-angular/sessions/0e38c414-30cb-4920-a7ea-3bc9882a866b Co-authored-by: Hristo313 <57346540+Hristo313@users.noreply.github.com>

Copilot AI changed the title ~~[WIP] Fix pivot grid date dimension values not localized~~ feat(pivot-grid): localize fullDate dimension values in IgxPivotDateDimension Apr 29, 2026

Copilot finished work on behalf of Hristo313 April 29, 2026 11:25

Copilot AI requested a review from Hristo313 April 29, 2026 11:25

Copilot started work on behalf of Hristo313 April 29, 2026 14:03 View session

Copilot finished work on behalf of Hristo313 April 29, 2026 14:08

Hristo313 added 🛠️ status: in-development Issues and PRs with active development on them version: 22.0.x grid: pivot labels Apr 29, 2026

Hristo313 marked this pull request as ready for review April 29, 2026 14:28

Copilot AI review requested due to automatic review settings April 29, 2026 14:28

Copilot started reviewing on behalf of Hristo313 April 29, 2026 14:29 View session

Copilot AI reviewed Apr 29, 2026

View reviewed changes

Copilot started work on behalf of Hristo313 April 30, 2026 08:14 View session

Copilot AI and others added 2 commits April 30, 2026 08:19

fix(pivot-grid): address review comments on formatter type safety and…

6e07821

… date parsing Agent-Logs-Url: https://github.com/IgniteUI/igniteui-angular/sessions/fc2cee95-07d2-43e3-873c-8aafce84bc93 Co-authored-by: Hristo313 <57346540+Hristo313@users.noreply.github.com>

refactor(pivot-grid): simplify formatter coercion to use nullish coal…

859a146

…escing Agent-Logs-Url: https://github.com/IgniteUI/igniteui-angular/sessions/fc2cee95-07d2-43e3-873c-8aafce84bc93 Co-authored-by: Hristo313 <57346540+Hristo313@users.noreply.github.com>

Copilot finished work on behalf of Hristo313 April 30, 2026 08:22

Hristo313 added 💥 status: in-test PRs currently being tested and removed 🛠️ status: in-development Issues and PRs with active development on them labels Apr 30, 2026

Copilot finished work on behalf of Hristo313 April 30, 2026 11:50

Hristo313 requested a review from Copilot April 30, 2026 11:53

Copilot started reviewing on behalf of Hristo313 April 30, 2026 11:54 View session

fix(pivot-grid): revert copilot fix line

b664a7a

Copilot AI reviewed Apr 30, 2026

View reviewed changes

Hristo313 added ❌ status: awaiting-test PRs awaiting manual verification and removed 💥 status: in-test PRs currently being tested labels Apr 30, 2026

fix(pivot-grid): update with fixes

368595c

dkamburov requested a review from skrustev May 4, 2026 07:40

Hristo313 changed the title ~~feat(pivot-grid): add formatter to IPivotDimension for localizing dimension header values~~ feat(pivot-grid): fix date format based on the localization May 4, 2026

Hristo313 changed the title ~~feat(pivot-grid): fix date format based on the localization~~ fix(pivot-grid): fix date format based on the localization May 4, 2026

skrustev previously approved these changes May 7, 2026

View reviewed changes

skrustev self-requested a review May 7, 2026 07:27

Hristo313 added 2 commits May 7, 2026 10:39

Merge branch 'master' into copilot/fix-pivot-grid-date-localization

d97c5d3

Merge branch 'master' into copilot/fix-pivot-grid-date-localization

2c27c90

skrustev reviewed May 13, 2026

View reviewed changes

Comment thread projects/igniteui-angular/grids/core/src/pivot-grid.interface.ts Outdated

fix(pivot-grid): update with fixes

2eddc5d

Hristo313 dismissed skrustev’s stale review via 2eddc5d May 13, 2026 15:25

Merge branch 'master' into copilot/fix-pivot-grid-date-localization

505fad5

dkamburov self-assigned this May 18, 2026

dkamburov requested a review from skrustev May 18, 2026 08:16

Merge branch 'master' into copilot/fix-pivot-grid-date-localization

fdb6228

Copilot started work on behalf of Hristo313 May 19, 2026 07:59 View session

Copilot finished work on behalf of Hristo313 May 19, 2026 08:39

fix(pivot-grid): fix the locale change

4d01b26

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dkamburov commented May 18, 2026

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I tried to connect to the following addresses, but was blocked by firewall rules:

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Copilot AI commented Apr 29, 2026 •

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