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Add comprehensive demo page and finalize ARIA accessibility solution
Co-authored-by: dtopalov <7533599+dtopalov@users.noreply.github.com>
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‎examples-standalone/colorpicker-accessibility-fix/angular.json‎

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"builder": "@angular-devkit/build-angular:dev-server",
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"configurations": {
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"production": {
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"buildTarget": "grid-csp-enabled:build:production"
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"buildTarget": "colorpicker-accessibility-fix:build:production"
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},
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"development": {
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"buildTarget": "grid-csp-enabled:build:development"
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"buildTarget": "colorpicker-accessibility-fix:build:development"
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}
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},
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"defaultConfiguration": "development"
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},
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"extract-i18n": {
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"builder": "@angular-devkit/build-angular:extract-i18n",
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"options": {
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"buildTarget": "grid-csp-enabled:build"
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"buildTarget": "colorpicker-accessibility-fix:build"
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}
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},
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"test": {

‎examples-standalone/colorpicker-accessibility-fix/demo.html‎

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>ColorPicker ARIA Accessibility Fix</title>
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<style>
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body {
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font-family: Arial, sans-serif;
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max-width: 1200px;
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margin: 0 auto;
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padding: 20px;
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line-height: 1.6;
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}
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.example-section {
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margin-bottom: 40px;
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padding: 20px;
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border: 1px solid #e0e0e0;
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border-radius: 8px;
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background-color: #fafafa;
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}
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.issue-description {
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background-color: #ffeaa7;
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padding: 15px;
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border-radius: 5px;
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margin: 15px 0;
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border-left: 4px solid #fdcb6e;
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}
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.solution-description {
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background-color: #d5f4e6;
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padding: 15px;
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border-radius: 5px;
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margin: 15px 0;
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border-left: 4px solid #81ecec;
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}
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.code-example {
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background-color: #f4f4f4;
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padding: 15px;
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border-radius: 5px;
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margin: 15px 0;
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border-left: 4px solid #3498db;
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font-family: 'Courier New', monospace;
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overflow-x: auto;
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}
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.problem-code {
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border-left-color: #e74c3c;
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background-color: #fdf2f2;
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}
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.solution-code {
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border-left-color: #27ae60;
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background-color: #f2fdf4;
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}
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code {
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background-color: #f4f4f4;
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padding: 2px 4px;
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border-radius: 3px;
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font-family: 'Courier New', monospace;
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color: #e74c3c;
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}
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.mock-colorgradient {
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width: 200px;
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height: 100px;
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background: linear-gradient(45deg, #ff0000, #00ff00, #0000ff);
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border: 1px solid #ccc;
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border-radius: 4px;
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display: inline-block;
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margin: 10px 0;
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position: relative;
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cursor: pointer;
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}
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.mock-colorgradient::after {
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content: "Color Gradient Area";
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position: absolute;
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top: 50%;
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left: 50%;
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transform: translate(-50%, -50%);
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color: white;
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text-shadow: 1px 1px 2px rgba(0,0,0,0.8);
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font-size: 12px;
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}
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.warning {
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color: #e74c3c;
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font-weight: bold;
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}
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.success {
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color: #27ae60;
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font-weight: bold;
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}
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ul li {
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margin-bottom: 8px;
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}
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</style>
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</head>
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<body>
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<h1>ColorPicker ARIA Accessibility Fix</h1>
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<div class="example-section">
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<h2>🚨 The Problem</h2>
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<div class="issue-description">
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<p>ARIA attributes like <code>aria-readonly="false"</code> were being applied to <code>k-colorgradient</code> elements without appropriate semantic roles, causing accessibility violations detected by tools like Axe.</p>
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<p><strong>Accessibility Error:</strong> <span class="warning">"ARIA attribute is not allowed: aria-readonly='false'"</span></p>
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<p><strong>Element Location:</strong> k-colorgradient</p>
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</div>
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<h3>Problematic Implementation:</h3>
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<div class="code-example problem-code">
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<pre>&lt;!-- ❌ WRONG: ARIA attribute without proper role --&gt;
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&lt;kendo-colorgradient aria-readonly="false" class="k-colorgradient"&gt;
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&lt;!-- gradient content --&gt;
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&lt;/kendo-colorgradient&gt;</pre>
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</div>
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<div class="mock-colorgradient" aria-readonly="false" title="This would trigger accessibility violation"></div>
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<p><em>↑ This element would trigger the ARIA accessibility violation</em></p>
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</div>
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<div class="example-section">
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<h2>✅ The Solution</h2>
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<div class="solution-description">
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<p>Ensure ARIA attributes are applied correctly with proper roles and semantic context.</p>
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</div>
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<h3>Solution Approach 1: Proper Role Assignment</h3>
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<div class="code-example solution-code">
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<pre>&lt;!-- ✅ CORRECT: ARIA attribute with appropriate role --&gt;
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&lt;kendo-colorgradient
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role="application"
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aria-readonly="false"
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aria-label="Color gradient selector"
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class="k-colorgradient"&gt;
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&lt;!-- gradient content --&gt;
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&lt;/kendo-colorgradient&gt;</pre>
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</div>
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<h3>Solution Approach 2: Conditional ARIA Attributes</h3>
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<div class="code-example solution-code">
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<pre>&lt;!-- ✅ CORRECT: Conditional ARIA application --&gt;
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&lt;kendo-colorgradient
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class="k-colorgradient"
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[attr.aria-readonly]="isReadonly ? 'true' : null"
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[attr.role]="hasInteractiveElements ? 'application' : null"&gt;
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&lt;!-- gradient content --&gt;
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&lt;/kendo-colorgradient&gt;</pre>
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</div>
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<h3>Solution Approach 3: Semantic HTML Structure</h3>
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<div class="code-example solution-code">
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<pre>&lt;!-- ✅ CORRECT: Proper semantic structure --&gt;
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&lt;div role="slider"
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aria-readonly="false"
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aria-valuenow="128"
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aria-valuemin="0"
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aria-valuemax="255"
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aria-label="Color gradient slider"
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class="k-colorgradient"&gt;
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&lt;!-- gradient slider content --&gt;
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&lt;/div&gt;</pre>
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</div>
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<div class="mock-colorgradient" role="application" aria-readonly="false" aria-label="Color gradient selector" title="This has proper accessibility implementation"></div>
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<p><em>↑ This element has proper ARIA accessibility implementation</em></p>
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</div>
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<div class="example-section">
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<h2>ARIA Attribute Guidelines</h2>
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<table border="1" style="width: 100%; border-collapse: collapse; margin: 15px 0;">
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<thead>
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<tr style="background-color: #3498db; color: white;">
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<th style="padding: 10px;">Role</th>
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<th style="padding: 10px;">Supported ARIA Attributes</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td style="padding: 8px;"><code>slider</code></td>
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<td style="padding: 8px;"><code>aria-readonly</code>, <code>aria-disabled</code>, <code>aria-valuenow</code>, <code>aria-valuemin</code>, <code>aria-valuemax</code>, <code>aria-label</code></td>
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</tr>
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<tr style="background-color: #f9f9f9;">
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<td style="padding: 8px;"><code>application</code></td>
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<td style="padding: 8px;"><code>aria-readonly</code>, <code>aria-disabled</code>, <code>aria-label</code>, <code>aria-describedby</code></td>
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</tr>
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<tr>
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<td style="padding: 8px;"><code>button</code></td>
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<td style="padding: 8px;"><code>aria-disabled</code>, <code>aria-pressed</code>, <code>aria-label</code></td>
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</tr>
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<tr style="background-color: #f9f9f9;">
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<td style="padding: 8px;"><code>textbox</code></td>
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<td style="padding: 8px;"><code>aria-readonly</code>, <code>aria-disabled</code>, <code>aria-invalid</code>, <code>aria-required</code></td>
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</tr>
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</tbody>
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</table>
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</div>
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<div class="example-section">
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<h2>Implementation Best Practices</h2>
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<ul>
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<li><span class="success">✅</span> Always assign appropriate roles before applying ARIA attributes</li>
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<li><span class="success">✅</span> Use semantic HTML elements when possible (e.g., <code>&lt;input&gt;</code>, <code>&lt;button&gt;</code>, <code>&lt;select&gt;</code>)</li>
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<li><span class="success">✅</span> Provide meaningful labels using <code>aria-label</code> or <code>aria-labelledby</code></li>
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<li><span class="success">✅</span> Include descriptions using <code>aria-describedby</code> for complex controls</li>
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<li><span class="success">✅</span> Test with accessibility tools like Axe, WAVE, or screen readers</li>
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<li><span class="success">✅</span> Use conditional attribute binding to avoid meaningless attributes</li>
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</ul>
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</div>
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<div class="example-section">
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<h2>Testing Checklist</h2>
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<p>To validate the accessibility improvements:</p>
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<ol>
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<li>Open browser developer tools</li>
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<li>Run Axe accessibility scanner</li>
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<li><span class="success">✅</span> Verify no ARIA attribute violations are reported</li>
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<li>Test keyboard navigation</li>
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<li>Test with screen readers (NVDA, JAWS, VoiceOver)</li>
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<li>Validate color contrast ratios</li>
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<li>Check focus management</li>
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</ol>
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</div>
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<div class="example-section">
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<h2>Related WCAG Guidelines</h2>
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<ul>
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<li><strong>WCAG 2.1 Success Criterion 4.1.2 (Name, Role, Value):</strong> Elements must have proper roles and properties</li>
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<li><strong>WCAG 2.1 Success Criterion 1.3.1 (Info and Relationships):</strong> Semantic structure must be preserved</li>
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<li><strong>WCAG 2.1 Success Criterion 2.1.1 (Keyboard):</strong> All functionality must be keyboard accessible</li>
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</ul>
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</div>
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<script>
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// Mock interaction for demonstration
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document.addEventListener('DOMContentLoaded', function() {
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const gradients = document.querySelectorAll('.mock-colorgradient');
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gradients.forEach(gradient => {
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gradient.addEventListener('click', function() {
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alert('Color gradient clicked! In a real implementation, this would open the color picker.');
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});
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gradient.addEventListener('keydown', function(e) {
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if (e.key === 'Enter' || e.key === ' ') {
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e.preventDefault();
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alert('Color gradient activated via keyboard! Accessibility maintained.');
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}
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});
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// Make focusable for keyboard users
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if (!gradient.hasAttribute('tabindex')) {
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gradient.setAttribute('tabindex', '0');
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}
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});
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});
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</script>
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</body>
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</html>

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