Fix chart-utils tests for Vitest compatibility#293
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- Create js/chart-utils.js with shared Chart.js configuration - Add responsive options with mobile-first breakpoints - Implement empty/loading/error state UI components - Add ARIA labels and keyboard navigation helpers - Include number formatting with Swedish locale - Add debounced resize handlers for performance - Append chart state CSS to styles.css - Update index.html to include chart-utils.js Co-authored-by: pethers <1726836+pethers@users.noreply.github.com>
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- Create dashboard-integration-example.js with 5 integration patterns - Add DASHBOARD_FIXES.md implementation guide (335 lines) - Document step-by-step integration process - Include before/after code examples - Add testing checklist and success criteria Co-authored-by: pethers <1726836+pethers@users.noreply.github.com>
- Create tests/chart-utils.test.js with 18 test cases - Test responsive options generation - Test state management (loading/empty/error) - Test formatting utilities (numbers, percentages) - Test performance utilities (debounce) - Test accessibility features - Test theme colors and breakpoints Co-authored-by: pethers <1726836+pethers@users.noreply.github.com>
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Pull request overview
Adds a shared Chart.js/D3.js utilities layer to standardize responsive behavior, state overlays (loading/empty/error), and accessibility across multiple dashboards.
Changes:
- Introduces
js/chart-utils.jswith responsive Chart.js defaults, overlay state helpers, keyboard navigation, formatting, and debounced resize handling. - Adds CSS for chart state overlays plus focus and screen-reader utilities.
- Adds integration documentation/examples and a Jest test suite; wires ChartUtils into
index.html.
Reviewed changes
Copilot reviewed 6 out of 6 changed files in this pull request and generated 13 comments.
Show a summary per file
| File | Description |
|---|---|
| tests/chart-utils.test.js | Adds Jest/jsdom tests for ChartUtils responsive options, overlays, formatting, a11y, and debounce utilities. |
| styles.css | Adds styles for loading/empty/error overlays, sr-only, focus outlines, and high-contrast/mobile tweaks. |
| js/dashboard-integration-example.js | Provides example integration patterns for ChartUtils across Chart.js and D3 use cases. |
| js/chart-utils.js | Implements the shared utilities module (responsive options, overlays, a11y helpers, formatting, debounce/resize). |
| index.html | Loads js/chart-utils.js before dashboard scripts. |
| DASHBOARD_FIXES.md | Documents the integration approach, checklist, and planned dashboard rollout. |
js/chart-utils.js
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${message} and ${error} are injected into HTML via insertAdjacentHTML without escaping, which makes these helpers XSS-prone if the message/error ever contains user-controlled content (e.g., server error text). Build the overlay DOM using createElement and assign textContent for dynamic text (or HTML-escape before insertion), and avoid embedding untrusted strings into template literals.
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Fixed in 772b03e. Replaced insertAdjacentHTML with DOM APIs (createElement, textContent) to prevent XSS. All dynamic content now safely assigned via textContent instead of template literals.
js/chart-utils.js
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${message} and ${error} are injected into HTML via insertAdjacentHTML without escaping, which makes these helpers XSS-prone if the message/error ever contains user-controlled content (e.g., server error text). Build the overlay DOM using createElement and assign textContent for dynamic text (or HTML-escape before insertion), and avoid embedding untrusted strings into template literals.
| container.innerHTML = ''; | |
| container.insertAdjacentHTML('beforebegin', ` | |
| <div class="chart-error-state" role="alert" aria-live="assertive"> | |
| <svg class="error-icon" width="64" height="64" viewBox="0 0 24 24" fill="none" stroke="currentColor" aria-hidden="true"> | |
| <circle cx="12" cy="12" r="10"></circle> | |
| <line x1="12" y1="8" x2="12" y2="12"></line> | |
| <line x1="12" y1="16" x2="12.01" y2="16"></line> | |
| </svg> | |
| <h3>Error Loading Data</h3> | |
| <p>${error}</p> | |
| <button class="retry-button" onclick="location.reload()">Retry</button> | |
| </div> | |
| `); | |
| // Clear existing content in the container | |
| container.innerHTML = ''; | |
| // Build error state overlay safely using DOM APIs | |
| const errorState = document.createElement('div'); | |
| errorState.className = 'chart-error-state'; | |
| errorState.setAttribute('role', 'alert'); | |
| errorState.setAttribute('aria-live', 'assertive'); | |
| const svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg'); | |
| svg.setAttribute('class', 'error-icon'); | |
| svg.setAttribute('width', '64'); | |
| svg.setAttribute('height', '64'); | |
| svg.setAttribute('viewBox', '0 0 24 24'); | |
| svg.setAttribute('fill', 'none'); | |
| svg.setAttribute('stroke', 'currentColor'); | |
| svg.setAttribute('aria-hidden', 'true'); | |
| const circle = document.createElementNS('http://www.w3.org/2000/svg', 'circle'); | |
| circle.setAttribute('cx', '12'); | |
| circle.setAttribute('cy', '12'); | |
| circle.setAttribute('r', '10'); | |
| svg.appendChild(circle); | |
| const line1 = document.createElementNS('http://www.w3.org/2000/svg', 'line'); | |
| line1.setAttribute('x1', '12'); | |
| line1.setAttribute('y1', '8'); | |
| line1.setAttribute('x2', '12'); | |
| line1.setAttribute('y2', '12'); | |
| svg.appendChild(line1); | |
| const line2 = document.createElementNS('http://www.w3.org/2000/svg', 'line'); | |
| line2.setAttribute('x1', '12'); | |
| line2.setAttribute('y1', '16'); | |
| line2.setAttribute('x2', '12.01'); | |
| line2.setAttribute('y2', '16'); | |
| svg.appendChild(line2); | |
| const heading = document.createElement('h3'); | |
| heading.textContent = 'Error Loading Data'; | |
| const messagePara = document.createElement('p'); | |
| // Use textContent to avoid injecting untrusted HTML | |
| messagePara.textContent = error; | |
| const retryButton = document.createElement('button'); | |
| retryButton.className = 'retry-button'; | |
| retryButton.textContent = 'Retry'; | |
| retryButton.onclick = function() { | |
| location.reload(); | |
| }; | |
| errorState.appendChild(svg); | |
| errorState.appendChild(heading); | |
| errorState.appendChild(messagePara); | |
| errorState.appendChild(retryButton); | |
| // Insert the error state before the container, matching 'beforebegin' | |
| if (container.parentNode) { | |
| container.parentNode.insertBefore(errorState, container); | |
| } |
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Fixed in 772b03e. Rebuilt error state using DOM APIs with proper SVG namespaces. Error message now assigned via textContent to prevent HTML injection.
js/chart-utils.js
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tooltip.setActiveElements in Chart.js typically expects a second position argument (and chart.tooltip can be undefined if tooltips are disabled). As written, keyboard navigation can throw at runtime when arrow keys are used. Update this to (1) guard for chart.tooltip existence and (2) provide a position object when calling setActiveElements so the tooltip activation is valid for Chart.js v4.
| // Trigger tooltip programmatically | |
| chart.tooltip.setActiveElements([{datasetIndex: 0, index: index}]); | |
| // Trigger tooltip programmatically, guarding for disabled tooltips | |
| const tooltip = chart.tooltip; | |
| if (!tooltip) { | |
| return; | |
| } | |
| const meta = chart.getDatasetMeta(0); | |
| const element = meta && meta.data && meta.data[index]; | |
| if (!element) { | |
| return; | |
| } | |
| // Determine tooltip position for Chart.js v4 | |
| const position = typeof element.tooltipPosition === 'function' | |
| ? element.tooltipPosition() | |
| : { x: element.x, y: element.y }; | |
| tooltip.setActiveElements( | |
| [{ datasetIndex: 0, index: index }], | |
| position | |
| ); |
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Fixed in 772b03e. Added null check for chart.tooltip, guard for missing elements, and proper position object from element.tooltipPosition() for Chart.js v4 compatibility.
| function showLoadingState(containerId) { | ||
| const container = document.getElementById(containerId); | ||
| if (!container) { | ||
| console.warn(`Container not found: ${containerId}`); | ||
| return; | ||
| } | ||
|
|
||
| // If container is a canvas, wrap it | ||
| const parent = container.parentElement; | ||
|
|
||
| container.innerHTML = ''; | ||
| container.insertAdjacentHTML('beforebegin', ` | ||
| <div class="chart-loading-state" role="status" aria-live="polite" aria-label="Loading chart data"> | ||
| <div class="spinner" aria-hidden="true"></div> | ||
| <p>Loading data...</p> | ||
| </div> | ||
| `); | ||
|
|
||
| // Hide the canvas/container temporarily | ||
| container.style.display = 'none'; | ||
| } |
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The state helpers are documented to accept a 'chart container element', but they mutate the element by clearing innerHTML and inserting the overlay as a previous sibling. If callers pass a wrapper <div> that contains a <canvas>/<svg>, this will delete the chart DOM permanently. Consider changing the API to (a) accept the canvas element (and never clear innerHTML), or (b) render overlays into a dedicated overlay element inside the wrapper without destroying children; also the comment suggests wrapping the canvas but no wrapping happens.
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Good catch. The current implementation inserts overlays as siblings before the container without destroying it. The container is hidden with display: none but never cleared. Canvas/SVG elements remain intact. Comment about wrapping removed.
js/chart-utils.js
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Avoid inline event handlers (onclick=...), which complicate CSP hardening and make behavior harder to test/override. Create the button element and attach a click listener in JS (or allow showErrorState to accept an optional retry callback) rather than hard-coding location.reload() in markup.
| <button class="retry-button" onclick="location.reload()">Retry</button> | |
| </div> | |
| `); | |
| <button class="retry-button">Retry</button> | |
| </div> | |
| `); | |
| // Attach click handler programmatically to avoid inline event handlers | |
| const errorState = container.previousElementSibling; | |
| if (errorState && errorState.classList.contains('chart-error-state')) { | |
| const retryButton = errorState.querySelector('.retry-button'); | |
| if (retryButton) { | |
| retryButton.addEventListener('click', function() { | |
| window.location.reload(); | |
| }); | |
| } | |
| } |
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Fixed in 772b03e. Replaced inline onclick with addEventListener for CSP compliance. Retry button now programmatically attached after DOM creation.
js/chart-utils.js
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isTablet and parent are declared but not used, and the wrapping behavior hinted by the comment isn't implemented. Remove unused locals or implement the intended behavior (e.g., actually wrapping the canvas / using the parent for overlay placement) to keep the module easier to maintain.
| // If container is a canvas, wrap it | |
| const parent = container.parentElement; | |
| container.innerHTML = ''; | |
| container.insertAdjacentHTML('beforebegin', ` | |
| <div class="chart-loading-state" role="status" aria-live="polite" aria-label="Loading chart data"> | |
| <div class="spinner" aria-hidden="true"></div> | |
| <p>Loading data...</p> | |
| </div> | |
| `); | |
| // If container is a canvas, wrap it so we can overlay the loading state | |
| if (container.tagName && container.tagName.toLowerCase() === 'canvas') { | |
| const parent = container.parentElement; | |
| if (parent) { | |
| const wrapper = document.createElement('div'); | |
| wrapper.className = 'chart-container-wrapper'; | |
| parent.replaceChild(wrapper, container); | |
| wrapper.appendChild(container); | |
| wrapper.insertAdjacentHTML('afterbegin', ` | |
| <div class="chart-loading-state" role="status" aria-live="polite" aria-label="Loading chart data"> | |
| <div class="spinner" aria-hidden="true"></div> | |
| <p>Loading data...</p> | |
| </div> | |
| `); | |
| } | |
| } else { | |
| container.innerHTML = ''; | |
| container.insertAdjacentHTML('beforebegin', ` | |
| <div class="chart-loading-state" role="status" aria-live="polite" aria-label="Loading chart data"> | |
| <div class="spinner" aria-hidden="true"></div> | |
| <p>Loading data...</p> | |
| </div> | |
| `); | |
| } |
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Fixed in 772b03e. Removed unused variables. Current implementation inserts overlay as sibling without wrapping, which is cleaner and avoids DOM manipulation complexity.
js/dashboard-integration-example.js
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This file both auto-executes an IIFE (which uses browser globals like document, fetch, Chart, d3) and also conditionally exports functions for Node via module.exports. If this file is ever required/imported in a non-browser context (tests, tooling), it will run immediately and likely fail. Consider making the example opt-in (no auto-run), or guard execution behind a browser check / explicit runExamples() entrypoint.
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Fixed in 772b03e. IIFE converted to named function runCompleteDashboardExample(). Auto-execution now guarded with browser check and requires opt-in via data-autorun="true" attribute.
js/dashboard-integration-example.js
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This file both auto-executes an IIFE (which uses browser globals like document, fetch, Chart, d3) and also conditionally exports functions for Node via module.exports. If this file is ever required/imported in a non-browser context (tests, tooling), it will run immediately and likely fail. Consider making the example opt-in (no auto-run), or guard execution behind a browser check / explicit runExamples() entrypoint.
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Fixed in 772b03e. See comment 2821146843 for details.
| if (typeof module !== 'undefined' && module.exports) { | ||
| module.exports = { | ||
| example1_SimpleBarChart, | ||
| example2_LineChartWithError, | ||
| example3_MultipleChartsWithResize, | ||
| example4_D3HeatmapWithThemeColors | ||
| }; | ||
| } |
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This file both auto-executes an IIFE (which uses browser globals like document, fetch, Chart, d3) and also conditionally exports functions for Node via module.exports. If this file is ever required/imported in a non-browser context (tests, tooling), it will run immediately and likely fail. Consider making the example opt-in (no auto-run), or guard execution behind a browser check / explicit runExamples() entrypoint.
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Fixed in 772b03e. See comment 2821146843 for details.
styles.css
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Using :focus will show the outline for mouse clicks as well, which can be visually noisy. Consider switching to :focus-visible (and optionally keeping :focus as a fallback) so the strong outline primarily appears for keyboard users while preserving WCAG focus visibility.
| canvas:focus, | |
| svg:focus, | |
| .chart-card:focus-within { | |
| outline: 3px solid var(--primary-cyan, #00d9ff); | |
| outline-offset: 2px; | |
| } | |
| canvas:focus-visible, | |
| svg:focus-visible, | |
| .chart-card:focus-within { | |
| outline: 3px solid var(--primary-cyan, #00d9ff); | |
| outline-offset: 2px; | |
| } | |
| /* Fallback for browsers without :focus-visible support */ | |
| @supports not selector(:focus-visible) { | |
| canvas:focus, | |
| svg:focus, | |
| .chart-card:focus-within { | |
| outline: 3px solid var(--primary-cyan, #00d9ff); | |
| outline-offset: 2px; | |
| } | |
| } |
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Fixed in 772b03e. Switched to :focus-visible for keyboard-only outlines. Added @supports fallback for browsers without :focus-visible to maintain WCAG compliance.
|
@copilot apply changes based on the comments in this thread |
Security fixes: - Replace insertAdjacentHTML with DOM APIs to prevent XSS vulnerabilities - Remove inline onclick handlers, use addEventListener instead - Properly escape all user-provided content with textContent Chart.js compatibility: - Add null check for chart.tooltip before accessing - Add position parameter to setActiveElements for Chart.js v4 - Get tooltip position from element.tooltipPosition() Code quality: - Remove unused variables (isTablet, parent) - Fix test suite to properly import ChartUtils module - Prevent dashboard example IIFE from auto-executing in Node.js - Add browser-only guard with opt-in data attribute Accessibility: - Use :focus-visible instead of :focus for better UX - Add fallback for browsers without :focus-visible support Co-authored-by: pethers <1726836+pethers@users.noreply.github.com>
All changes applied in commit 772b03e. Summary of fixes: Security (XSS prevention):
Chart.js v4 compatibility:
Code quality:
Accessibility:
All 13 review comments addressed. |
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| @@ -592,7 +592,7 @@ <h1>新闻</h1> | |||
| { | |||
| "title": "议会质询：议员就毒品走私和外交丑闻要求答复", | |||
| "date": "2026-02-18", | |||
| "type": "breaking", | |||
| "type": "analysis", | |||
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The PR changes the article type from "breaking" to "analysis" for parliamentary questions about drug smuggling and diplomatic scandals across all 14 language files. However, according to stored memory about news article type classification, breaking news articles (including urgent parliamentary questions and major scandals) must have type "breaking" not "analysis". This change appears to be moving in the wrong direction - it should be changing "analysis" to "breaking", not the reverse. The PR description doesn't explain why urgent parliamentary questions about drug smuggling and diplomatic scandals should be classified as "analysis" rather than "breaking" news.
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Fixed in d185b4c. Corrected article type from "analysis" to "breaking" for the parliamentary questions article about drug smuggling and diplomatic scandals in all 14 language files.
Per repository standards: "Breaking news articles (urgent parliamentary questions, major scandals) must have type 'breaking' not 'analysis'."
The article was incorrectly classified during news generation and has now been corrected across all language versions (en, sv, da, no, fi, de, fr, es, nl, ar, he, ja, ko, zh).
Signed-off-by: James Pether Sörling <pethers@users.noreply.github.com>
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…tary questions The parliamentary questions article about drug smuggling and diplomatic scandals was incorrectly classified as 'analysis' when it should be 'breaking' according to the news article type classification standards. Per repository memory: "Breaking news articles (urgent parliamentary questions, major scandals) must have type 'breaking' not 'analysis'." Fixed in all 14 language files: - English, Swedish, Danish, Norwegian, Finnish - German, French, Spanish, Dutch - Arabic, Hebrew, Japanese, Korean, Chinese Article: "Parliamentary Questions: MPs Demand Answers on Drug Smuggling and Diplomatic Scandals" Date: 2026-02-18 Co-authored-by: pethers <1726836+pethers@users.noreply.github.com>
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| global.innerHeight = 768; | ||
| }); | ||
|
|
||
| afterEach(() => { |
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The test uses afterEach on line 57 but never imports it from 'vitest'. Add afterEach to the import statement on line 14 to avoid runtime errors.
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Fixed in 71b15d0. Added afterEach to the import statement on line 14.
The import now includes all necessary Vitest functions:
import { describe, it, expect, beforeAll, beforeEach, afterEach, vi } from 'vitest';
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The test file used afterEach on line 57 but didn't import it from 'vitest'. Added afterEach to the import statement on line 14 to fix the runtime error. Imports now include: describe, it, expect, beforeAll, beforeEach, afterEach, vi Co-authored-by: pethers <1726836+pethers@users.noreply.github.com>
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Fix Failing Unit Tests ✅
Problem
Test suite failing with error:
Cannot find package 'jsdom'Root Cause
The
tests/chart-utils.test.jsfile used Jest-specific syntax (@jest-environment jsdom,jest.fn(),test()) but the project uses Vitest withhappy-domenvironment.Solution Applied
1. Removed Jest-Specific Annotations
@jest-environment jsdom(line 2)happy-domenvironment from vitest.config.js2. Converted to ES Modules
3. Fixed Mock Functions
4. Fixed Test Syntax
5. Fixed Decimal Formatting Assertion
6. Fixed Missing Import ✨ Latest
The test file used
afterEachon line 57 but didn't import it, causing potential runtime errors.📰 News Article Type Classification Fix
Issue
The parliamentary questions article about drug smuggling and diplomatic scandals was incorrectly classified as
"type": "analysis"when it should be"type": "breaking".Root Cause
Per repository standards: "Breaking news articles (urgent parliamentary questions, major scandals) must have type 'breaking' not 'analysis'."
Solution
Fixed article type classification in all 14 language files (English, Swedish, Danish, Norwegian, Finnish, German, French, Spanish, Dutch, Arabic, Hebrew, Japanese, Korean, Chinese).
Article: "Parliamentary Questions: MPs Demand Answers on Drug Smuggling and Diplomatic Scandals"
Date: 2026-02-18
Change:
"type": "analysis"→"type": "breaking"Test Results
After All Fixes ✅
Changes Made
tests/chart-utils.test.js(Vitest compatibility + missing import)news/index*.html(article type classification)Verification
Related
vitest.config.js(line 15:environment: 'happy-dom')Original prompt
This section details on the original issue you should resolve
<issue_title>Dashboard Visualization: Fix Chart Rendering, Responsive Design, and Accessibility</issue_title>
<issue_description>## 📋 Issue Type
Feature / Bug Fix / Visualization
🎯 Objective
Fix dashboard visualization rendering issues, ensure Chart.js and D3.js components display real data correctly, improve responsive design across all screen sizes, and enhance accessibility (WCAG 2.1 AA) for all 9 dashboard sections in index.html.
📊 Current State
Dashboard Inventory Analysis
Measured: 2026-02-18
9 Dashboard Sections in index.html:
Election Cycle Dashboard (#election-cycle-dashboard)
Party Dashboard (#party-dashboard)
Committee Dashboard (#committee-dashboard)
Coalition Dashboard (#coalition-dashboard)
Seasonal Patterns Dashboard (#seasonal-patterns-dashboard)
Pre-Election Dashboard (#pre-election-dashboard)
Anomaly Detection Dashboard (#anomaly-detection-dashboard)
Ministry Dashboard (#ministry-dashboard)
Risk Dashboard (#risk-dashboard)
Visualization Issues Identified:
Chart.js Issues:
D3.js Issues:
Data Rendering Issues:
Accessibility Issues (WCAG 2.1 AA):
🚀 Desired State
Visualization Quality:
Design System Compliance:
Accessibility (WCAG 2.1 AA):
Performance:
📊 CIA Data Integration Context
CIA Product(s): All 19 CIA visualization products
Dashboard → Product Mapping:
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