T1328375 - Web Dashboard: "Uncaught TypeError: Cannot read properties of null (reading 'hide')" error is thrown on attempt to scroll above the Bar column#33686
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Pull request overview
Fixes a sparklines/bullet tooltip lifecycle issue where calling tooltip hide logic after tooltip disposal could throw (Cannot read properties of null (reading 'hide')). This aligns tooltip state tracking with tooltip disposal in the internal sparkline implementation and adds a regression test to prevent reintroduction.
Changes:
- Reset
_tooltipShowntofalsewhen the tooltip instance is disposed inBaseSparkline. - Add a QUnit regression test ensuring
_hideTooltip()doesn’t throw afterdispose()ondxBullet.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
| packages/devextreme/testing/tests/DevExpress.viz.sparklines/baseSparklineTooltipEvents.tests.js | Adds a regression test covering calling _hideTooltip() after disposal and asserting no runtime errors. |
| packages/devextreme/js/__internal/viz/sparklines/base_sparkline.ts | Clears _tooltipShown during tooltip disposal to prevent calling hide() on a disposed/null tooltip. |
pharret31
reviewed
May 22, 2026
…seSparklineTooltipEvents.tests.js Co-authored-by: Andrei Kharitonov <andrei.kharitonov@devexpress.com> Signed-off-by: Dmitry Lavrinovich <52966626+dmlvr@users.noreply.github.com>
pharret31
approved these changes
May 22, 2026
EugeniyKiyashko
approved these changes
May 25, 2026
This was referenced May 25, 2026
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