Kilotest: Diagnoses of assertive region not atomic violation by HTML element 260 on Mozilla Foundation page

Here is how tools diagnose the assertive region not atomic issue for HTML element 260 of the Mozilla Foundation page.

Basics

• About the assertive region not atomic issue
  • Why it matters: User may be unable to get help on what content has changed
  • Priority: low
  • Related WCAG standard: 4.1.3
• About the Mozilla Foundation page
  • URL: https://www.mozilla.org/en-US/
  • Tested on 2026-04-03 at 03:56
• About HTML element 260
  • Take me there
  • Tag name: SECTION
  • Text: Pause animation … Learn about us
  • Start tag: <section class="m24-c-flag" data-animation-running="true">
  • XPath: /html/body/div[2]/main[1]/div[1]/section[1]
  • Bounding box: x = 240, y = 57, width = 1440, height = 671

Diagnoses

1. The assertive region is not atomic

   Tool: Alfa (Siteimprove)

   Rule: r54