🎨 Palette: Improve Telemetry Table Accessibility and State#14
🎨 Palette: Improve Telemetry Table Accessibility and State#14
Conversation
- Add empty state handling for TelemetryTimeline when data is missing - Improve table accessibility with scope attributes and captions - Add hover effect to table rows for better readability - Add .sr-only utility class for screen reader support 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 component. It addresses scenarios where data might be absent by providing a clear empty state, and it makes the data table much more navigable and understandable for users relying on screen readers. Additionally, it improves general usability with visual cues and introduces a foundational accessibility utility for future use. Highlights
Changelog
Activity
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Code Review
This pull request significantly improves the Telemetry Timeline component by adding a proper empty state and enhancing table accessibility with scope attributes and a screen-reader-only caption. These are excellent changes for usability and accessibility. My review includes a few suggestions to further improve code maintainability by refactoring a small amount of code duplication, moving inline styles to the global stylesheet, and using CSS variables for colors.
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| /* Telemetry Table Enhancements */ | ||
| .telemetry-table tr:hover { | ||
| background-color: #f5f5f5; |
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The hardcoded color #f5f5f5 makes it difficult to manage themes or make global style changes. Consider defining colors as CSS variables in the :root selector and reusing them. This would improve maintainability across the project.
For example:
:root {
--color-background-hover: #f5f5f5;
/* other colors */
}
.telemetry-table tr:hover {
background-color: var(--color-background-hover);
/* ... */
}This practice could be extended to other hardcoded colors in the application, like those in TelemetryTimeline.tsx.
| if (!chartData || chartData.length === 0) { | ||
| return ( | ||
| <div style={{ padding: '20px' }}> | ||
| <Card> | ||
| <h2>Telemetry Timeline</h2> | ||
| <div style={{ padding: '40px', textAlign: 'center', color: '#666' }}> | ||
| <p>No telemetry data available. Check back later!</p> | ||
| </div> | ||
| </Card> | ||
| </div> | ||
| ); | ||
| } |
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There's some code duplication between the empty state and the data-filled state. The outer div, the Card component, and the h2 title are repeated. You can refactor this to remove the duplication by moving the conditional logic inside the Card, making the component cleaner and easier to maintain.
For example:
return (
<div style={{ padding: '20px' }}>
<Card>
<h2>Telemetry Timeline</h2>
{(!chartData || chartData.length === 0) ? (
<div style={{ padding: '40px', textAlign: 'center', color: '#666' }}>
<p>No telemetry data available. Check back later!</p>
</div>
) : (
<>
{/* Chart and Table here */}
</>
)}
</Card>
</div>
);| {/* Optional: Raw Table for Details */} | ||
| <div style={{ overflowX: 'auto' }}> | ||
| <table style={{ width: '100%', borderCollapse: 'collapse' }}> | ||
| <table className="telemetry-table" style={{ width: '100%', borderCollapse: 'collapse' }}> |
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Great job adding the telemetry-table class! To further improve maintainability and separate concerns, consider moving all the inline styles from the <table> and its children (<tr>, <th>, <td>) to the app/globals.css file. This will centralize your styling and make the component's JSX cleaner.
For example, you could remove the style props and add this to your CSS:
.telemetry-table {
width: 100%;
border-collapse: collapse;
}
.telemetry-table th, .telemetry-table td {
padding: 10px;
}
.telemetry-table th {
text-align: left;
}
.telemetry-table thead tr {
border-bottom: 2px solid #ddd;
}
.telemetry-table tbody tr {
border-bottom: 1px solid #ddd;
}
.telemetry-table tbody th {
font-weight: normal;
}
💡 What:
scope="col"andscope="row"attributes for better screen reader navigation.<caption>for the table..sr-onlyutility class to global styles.🎯 Why:
📸 Before/After:
(Visual changes are subtle: hover effect added, empty state visible when data is missing. Structural changes are significant for assistive tech.)
♿ Accessibility:
scope="col"to all headers.<th scope="row">) for better context.sr-onlycaption "Telemetry Event Log".PR created automatically by Jules for task 11149898863500697601 started by @igor-holt