WCAG 2.2 Accessibility Scenario Learning Hub

A guided course for learning accessibility through realistic, industry-grounded product scenarios. Each scenario carries a unique real-world example, plain-language explanation, and a direct reference to the official WCAG 2.2 Understanding document.

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301 scenarios

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Module · Perceivable

1.4.4 — Resize Text

Everything must still work with text enlarged to 200% — nothing cut off, overlapping, or lost.

AA 0 / 14 Open lesson

Fixed Line Height Causing Enlarged Text to Overlap Itself

1.4.4 AA

Line-height fixed in px so enlarged glyphs overlap vertically.

Tooltip or Dropdown Menu That Clips Text at 200% Zoom

1.4.4 AA

Tooltips/dropdown menus whose fixed dimensions clip options at 200%.

CSS Setting That Suppresses the Browser’s Text-Size Scaling

1.4.4 AA

text-size-adjust: none combined with px sizing suppressing platform text scaling.

Canvas-Rendered Text That Ignores Browser Zoom Completely

1.4.4 AA

Canvas-rendered text that ignores browser zoom/text scaling entirely.

Controls Pushed Off-Screen and Unreachable After Zooming

1.4.4 AA

Functionality loss: controls pushed off-screen with overflow:hidden (style that clips overflowing content) ancestors and no scroll access.

Mobile App That Ignores the Phone’s System Text-Size Setting

1.4.4 AA

A native mobile app ignores the operating system's text-size / display-zoom setting and offers no in-app way to enlarge text — users who need bigger text have no option at all.

Module · Perceivable

Glossary

Accessible name: The short name assistive technology uses for a control — often from a label, aria-label, or associated text.
Alt text (text alternative): The written description of an image that screen readers read aloud instead of the image.
ARIA: A set of HTML attributes that explain roles, names, and states to assistive technologies when native HTML is not enough.
Assistive technology (AT): Tools people with disabilities use to operate software: screen readers, magnifiers, voice control, switch devices.
Contrast ratio: A measured difference between text (or a graphic) and what sits behind it; higher ratios are easier to see.
Focus / keyboard focus: The single element currently 'selected' by the keyboard — where Enter/Space/typing will act. Moved with Tab.
Focus indicator: The visible highlight that shows which element currently has keyboard focus.
Focus order / tab order: The sequence elements are reached when pressing Tab repeatedly.
Keyboard trap: A situation where keyboard focus moves into a component and cannot move out using standard keys.
Landmark: A page region such as banner, navigation, main, or contentinfo that screen-reader users can jump between.
Live region / status role: Markup (for example aria-live or role="status") that tells screen readers to announce updates without moving focus.
Programmatically determinable: Available in code so software — not only human eyes — can read the information reliably.
Reading order: The order assistive technology reads content, which follows the DOM sequence rather than pure visual placement.
Screen reader: Software such as NVDA, JAWS, VoiceOver, or TalkBack that speaks or brailles interface content and controls.
Semantic markup: Using HTML elements that match meaning (headings, lists, tables, buttons) instead of generic styled containers alone.
Viewport: The visible browser area. Reflow testing often uses about 320 CSS pixels of width.