Kilotest: Diagnoses of ID not unique violation by HTML element 421 on Opportunity Green page

Basics

About the page

• URL: https://www.opportunitygreen.org/
• Tested 3 days ago on 2026-10-07 at 22:06 by job 261007T2138-sqp
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 10
    • Reported any rule violations: 10
  • Violations: 767
  • Violators: 303
  • Issues: 72
• Download the full technical report (JSON)

About the issue

• Why it matters: User may be pointed to the wrong item
• Priority: highest
• Related WCAG standard: 4.1
• Reported by 3 rule engines (ASLint + Html Checker + HTML CodeSniffer)
• Violations: 23
• Violators: 13

About the violator

• Tag name: UL
• Text: Support us … Donate
• Start tag: <ul id="mega-menu-top_menu_right" class="mega-menu max-mega-menu mega-menu-horizontal" data-event="hover_intent" data-effect="fade_up" data-effect-speed="200" data-effect-mobile="slide_right" data-effect-speed-mobile="0" data-panel-width=".mastheadInner" data-mobile-force-width="false" data-second-click="go" data-document-click="collapse" data-vertical-behaviour="standard" data-breakpoint="1199" data-unbind="true" data-mobile-state="collapse_all" data-mobile-direction="vertical" data-mobile-back-text="{parent_title}">
• XPath: /html/body/div[2]/header[1]/div[1]/div[1]/div[3]/div[1]/ul[1]
• Bounding box: x = 1328, y = 108, width = 227, height = 40
• Reported by ASLint

Diagnoses

Here is how rule engines diagnose the ID not unique issue for HTML element 421 of the Opportunity Green page.

1. Attribute <code>id="mega-menu-item-3197"</code> should be unique. It has been defined 3 times.

   Rule engine: ASLint (eSSENTIAL Accessibility)

   Rule: duplicated_id_attribute