accessibility-review
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ChineseAccessibility Review
可访问性评审
Evaluate designs and implementations against WCAG 2.1 AA standards.
依据WCAG 2.1 AA标准评估设计与实现。
WCAG 2.1 AA Quick Reference
WCAG 2.1 AA 快速参考
Perceivable
可感知性
- 1.1.1 Non-text content has alt text
- 1.3.1 Info and structure conveyed semantically
- 1.4.3 Contrast ratio >= 4.5:1 (normal text), >= 3:1 (large text)
- 1.4.11 Non-text contrast >= 3:1 (UI components, graphics)
- 1.1.1 非文本内容配有替代文本(alt text)
- 1.3.1 信息与结构通过语义化方式传递
- 1.4.3 对比度 >= 4.5:1(常规文本),>= 3:1(大文本)
- 1.4.11 非文本内容对比度 >= 3:1(UI组件、图形)
Operable
可操作性
- 2.1.1 All functionality available via keyboard
- 2.4.3 Logical focus order
- 2.4.7 Visible focus indicator
- 2.5.5 Touch target >= 44x44 CSS pixels
- 2.1.1 所有功能均可通过键盘访问
- 2.4.3 合理的焦点顺序
- 2.4.7 可见的焦点指示器
- 2.5.5 触摸目标尺寸 >= 44x44 CSS像素
Understandable
可理解性
- 3.2.1 Predictable on focus (no unexpected changes)
- 3.3.1 Error identification (describe the error)
- 3.3.2 Labels or instructions for inputs
- 3.2.1 焦点状态可预测(无意外变化)
- 3.3.1 错误识别(描述错误内容)
- 3.3.2 输入框配有标签或说明
Robust
健壮性
- 4.1.2 Name, role, value for all UI components
- 4.1.2 所有UI组件具备名称、角色与属性值
Common Issues
常见问题
- Insufficient color contrast
- Missing form labels
- No keyboard access to interactive elements
- Missing alt text on meaningful images
- Focus traps in modals
- Missing ARIA landmarks
- Auto-playing media without controls
- Time limits without extension options
- 颜色对比度不足
- 表单标签缺失
- 交互元素无法通过键盘访问
- 有意义的图片缺失替代文本(alt text)
- 模态框存在焦点陷阱
- 缺失ARIA地标
- 媒体自动播放且无控制按钮
- 存在时间限制但无延长选项
Testing Approach
测试方法
- Automated scan (catches ~30% of issues)
- Keyboard-only navigation
- Screen reader testing (VoiceOver, NVDA)
- Color contrast verification
- Zoom to 200% — does layout break?
- 自动化扫描(可发现约30%的问题)
- 仅使用键盘导航测试
- 屏幕阅读器测试(VoiceOver、NVDA)
- 颜色对比度验证
- 放大至200%——布局是否损坏?