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outline.yml
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outline.yml
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Outline:
- Introduction
- Who is Marcy Sutton?
- Overview of what we’ll cover
- Examples of inaccessible web applications: show the pain
- Examples of better web applications
- Built HTML pages in Gatsby
- Install demos and tools
- Get people downloading the Gatsby demo app and NVDA if on Windows
- Gatsby Demo app
- Make sure everyone can install it and run the tests
- Do a quick tour of the source code
- Browser extensions / common testing tools
- Accessibility debugging: using some of the intro examples
- Rendering code in a browser for basic accessibility testing (quick explanation of web context / DOM vs. Node.js tooling)
- Prototyping: budo
- Gatsby demo app: starting a server with a bigger project
- Discuss other rendering/localhost options, like http-server and Vue/Angular-specific things
- Using the TAB key to check for keyboard support.
- Apple OS setting (a common gotcha)
- Visible focus outlines
- What shouldn’t be interactive/operable with TAB?
- EXERCISE: TAB through some webpages. Can you see where you are on the screen? Can you reach everything?
- Known patterns / ARIA Authoring Practices Guide
- Promote user testing with people with disabilities early and often
- Chrome devtools color contrast debugger
- Testing with the axe browser extensions for Chrome and Firefox
- EXERCISE: Run an extension on a site
- Screen reader testing overview
- Recommended combinations: Voiceover and Safari, NVDA and Firefox, JAWS and IE11, iOS Safari + Voiceover, Android Firefox + Talkback, Narrator and Edge
- Provide resources to learn more (cheat-sheets, training, etc.)
- EXERCISE: use a screen reader (Mac Voiceover, iOS or Android, NVDA or Narrator for Windows)
- Introduction to accessibility in JavaScript applications
- Myth busting: accessibility + JavaScript can be BFFs.
- Focus management requirements + patterns
- Discuss focus manager APIs vs. components handling their own focus
- Tabindex=”-1” vs. tabindex=”0”
- React refs / other framework APIs
- Use cases:
- View changes
- Focus in new layers, replacing on close
- Disabling background layers
- Handling removal of DOM nodes
- Note known issues with iOS and other assistive technologies that can sometimes require workarounds (focus on buttons instead of headings, etc.)
- Announcements using ARIA Live Regions
- Use cases vary, there’s often more than one way to achieve something (discuss focus management vs. wrapping updating content in a live region, when you might not want to move focus, etc.)
- Talk about Live Region requirements: must be rendered on page, but can be visually hidden
- Sometimes two regions per “politeness” level are necessary to get everything to announce
- A site-level announcement API might be the way to go
- Async save / update / etc.
- Title changes
- Combobox usage / list filtering
- Semantic HTML
- Using semantics with JSX; verifying output
- Putting landmarks into your app
- Unintrusive Animation + prefers-reduced-motion
- toggle button
- OS-level setting
- Progressive enhancement: accessible baselines, fallbacks, challenges with JS frameworks
- Accessibility units: component-level API concerns
- Automated unit testing approach
- Test in isolation
- Stub inputs/fixture data
- Often headless
- Fast changing of state
- React Component examples with failing tests: combobox.
- Accessible names (buttons, links, form controls)
- TIPS: don’t use “click here” for links, consider adding visible labels for buttons
- Keyboard interactions: escape key, arrow keys
- Toggling ARIA states
- EXERCISE: Choose a couple failing tests and make them pass
- SOLUTION: Fix them together
- Bonus info: configurable heading levels, passing in ARIA attributes with component DSLs (don’t make up ARIA attributes; use data attributes instead) etc.
- Accessible pages
- Integration/end-to-end testing approach
- Real-world browser testing
- Cypress vs. Selenium Webdriver
- Document/page-level accessibility rules: page title, HTML lang, color contrast, heading hierarchy
- Component interoperability
- Framework testing flexibility
- Accessibility testing APIs make more sense here as you can run an entire ruleset against each page
- Gatsby example with failing tests
- EXERCISE: Color contrast debugging with axe and Chrome devtools
- EXERCISE: Fix failing focus management tests (showing component interop)
- EXERCISE: get Cypress tests passing on a page
- Q&A