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- Add CustomTooltip component to TelemetryTimeline - Update getProbabilityData to include event and mode - Add scope attributes to table headers for accessibility - Add empty state handling for telemetry data Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
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Summary of ChangesHello @igor-holt, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request significantly enhances the user experience and accessibility of the Telemetry Timeline visualization. By integrating richer data directly into the chart's tooltip, users can now gain immediate insights into events and modes without manual correlation. Additionally, the associated data table has been made more accessible for screen readers, and a clear empty state message improves the handling of scenarios where no data is present. Highlights
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Pull request overview
Enhances the Telemetry Timeline UI by surfacing richer context directly in the chart tooltip and improving table accessibility/empty-state handling, reducing the need to cross-reference chart points with the raw data table.
Changes:
- Extend chart data mapping to include
eventandmodefor tooltip display. - Add a custom Recharts tooltip rendering Event/Mode/Probability and add an empty-state message for missing telemetry data.
- Add
scope="col"on table header cells (and attempt to add row scoping for the first column).
Reviewed changes
Copilot reviewed 3 out of 4 changed files in this pull request and generated 3 comments.
| File | Description |
|---|---|
data/telemetry.ts |
Includes event and mode in chart datapoints for richer visualization context. |
components/TelemetryTimeline.tsx |
Adds custom tooltip, table empty state, and accessibility scope attributes. |
pnpm-lock.yaml |
Introduces a pnpm lockfile (in addition to an existing npm lockfile). |
.Jules/palette.md |
Documents the UX lesson/approach for retaining contextual fields in visualization transformations. |
Files not reviewed (1)
- pnpm-lock.yaml: Language not supported
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| <tbody> | ||
| {telemetryData.map((entry) => ( | ||
| <tr key={entry.logId} style={{ borderBottom: '1px solid #ddd' }}> | ||
| <td scope="row" style={{ padding: '10px' }}>{entry.logId}</td> |
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scope="row" is not valid on a <td> element; screen readers will not treat this cell as a row header. Use a row header cell (<th scope="row">) for the first column in the table body (and keep <td> for the rest of the row).
| <td scope="row" style={{ padding: '10px' }}>{entry.logId}</td> | |
| <th scope="row" style={{ padding: '10px' }}>{entry.logId}</th> |
| const CustomTooltip = ({ active, payload, label }: any) => { | ||
| if (active && payload && payload.length) { | ||
| const data = payload[0].payload; |
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CustomTooltip is typed as any, which discards type-safety in a strict TypeScript project and makes it easier to accidentally access missing fields on payload/label. Prefer typing this component using Recharts' tooltip props types (e.g., TooltipProps<ValueType, NameType>) and a typed shape for your chart datum (time/probability/event/mode).
| lockfileVersion: '9.0' | ||
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| settings: | ||
| autoInstallPeers: true | ||
| excludeLinksFromLockfile: false |
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This repo already includes package-lock.json, but this PR adds a new pnpm-lock.yaml. Having multiple lockfiles typically leads to dependency drift and ambiguous install instructions/CI behavior. If the intent is to migrate to pnpm, remove package-lock.json and declare the package manager (e.g., via package.json#packageManager) and update docs/CI; otherwise, drop pnpm-lock.yaml from this PR.
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Code Review
This pull request enhances the telemetry visualization by adding a custom tooltip for the chart, implementing an empty state for the data table, and improving table accessibility. The changes significantly improve the user experience and handle edge cases gracefully. My review includes a few suggestions to further improve code quality, focusing on TypeScript best practices by replacing an any type, improving maintainability by extracting inline styles, and correcting an accessibility attribute to ensure it is effective.
| ResponsiveContainer, | ||
| } from 'recharts'; | ||
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| const CustomTooltip = ({ active, payload, label }: any) => { |
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For better type safety and maintainability, avoid using any. The props for this component can be strongly typed using TooltipProps from recharts.
You'll need to add TooltipProps to your existing recharts import.
| const CustomTooltip = ({ active, payload, label }: any) => { | |
| const CustomTooltip = ({ active, payload, label }: TooltipProps<number, string>) => { |
| <div style={{ | ||
| backgroundColor: '#fff', | ||
| border: '1px solid #ccc', | ||
| padding: '10px', | ||
| borderRadius: '4px', | ||
| boxShadow: '0 2px 4px rgba(0,0,0,0.1)' | ||
| }}> |
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This component uses several inline styles. To improve maintainability and reusability, consider extracting these styles into CSS classes in your globals.css file or a dedicated stylesheet. This approach centralizes styling, making it easier to manage and update. This feedback also applies to the inline styles used in the table below.
| <tbody> | ||
| {telemetryData.map((entry) => ( | ||
| <tr key={entry.logId} style={{ borderBottom: '1px solid #ddd' }}> | ||
| <td scope="row" style={{ padding: '10px' }}>{entry.logId}</td> |
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The scope="row" attribute is not valid on a <td> element and will be ignored by screen readers. To correctly associate this cell as a row header for accessibility, it should be a <th> element. I've suggested changing it and adding fontWeight: 'normal' to preserve the original visual styling.
| <td scope="row" style={{ padding: '10px' }}>{entry.logId}</td> | |
| <th scope="row" style={{ padding: '10px', fontWeight: 'normal' }}>{entry.logId}</th> |
💡 What:
🎯 Why:
📸 Before/After:
scope="col".♿ Accessibility:
scope="col"to<th>elements.scope="row"to the first column (Log ID).PR created automatically by Jules for task 2856000312763381560 started by @igor-holt