WCAG version: 2.1
Collection of success criterion published in WCAG version 2.1 in 2018. Notably adds mobile, low vision, and cognitive updates.
2.4.9 Link Purpose (Link Only)
The purpose of each link must be clear; from the link text alone; without relying on surrounding context.
2.4.10 Section Headings
Related content must be organized into clear sections using headings.
2.5.1 Pointer Gestures
Actions that rely on gestures (like swiping or pinching) must also be possible using a single tap, click, or button.
2.5.2 Pointer Cancellation
Actions must not trigger on press or touch down. They must only trigger on release (like mouse-up or finger lift).
2.5.3 Label in Name
The visible text of a button, link, or form field must also be part of its accessible (programmatic) name.
2.5.4 Motion Actuation
If an action can be triggered by motion (like shaking or tilting the device), it must also work without motion, and be possible to turn off motion-based input.
2.5.5 Target Size (Enhanced)
Targets for touch or mouse must be at least 44×44px, unless they are part of a sentence or block of text, near another target with the same function that meets the size, or in a context where size can’t be increased.
2.5.6 Concurrent Input Mechanisms
It must be possible to switch between input types (mouse, keyboard, touch, voice) without losing access to any functionality.
3.1.1 Language of Page
Each page must have a <html lang=""> attribute that matches the main language of the page.
3.1.2 Language of Parts
Any parts of the content in a different language must be marked with the correct lang attribute. Expressions borrowed from another language (like “déjà vu” in English) do not need this, unless pronunciation or understanding would be affected.
