WCAG version: 2.0
Collection of success criterion published in WCAG version 2.0 in 2008.
2.2.3 No Timing
Content must not include time limits for reading or interaction, unless it’s part of a live event or time-based activity (e.g. auctions, broadcasts).
2.2.4 Interruptions
Interruptions (like pop-ups, alerts, or notifications) must be able to be delayed or suppressed, and controlled, except in emergencies (e.g. critical system warnings).
2.2.5 Re-authenticating
When (re-)authentication is required (e.g. after session timeout), all previously entered data must be preserved so the task can continue without starting over.
2.3.1 Three Flashes or Below Threshold
Content must not flash, blink, or flicker more than three times per second, unless it stays within safety limits designed to avoid visual overload and reduce the risk of seizures.
2.3.2 Three Flashes
Content must not flash, blink, or flicker more than three times per second (no exception, not even if it meets safety thresholds).
2.4.1 Bypass Blocks
It must be possible to skip repeated blocks of content (e.g. navigation, header) and jump directly to the main part of the page.
2.4.2 Page Titled
Each page must have a unique and descriptive that reflects its topic or purpose.
2.4.3 Focus Order
Focus must follow a logical and meaningful order that preserves relationships and matches how the page is naturally read, regardless of layout or language direction.
2.4.4 Link Purpose (In Context)
The purpose of each link must be clear from the link text itself, or the surrounding context.
2.4.5 Multiple Ways
At least two different ways must be available to find pages or content (e.g. navigation menus, on-page links, site search, or a sitemap).
