Kilotest: Diagnoses of ID not unique violation by HTML element 304 on California YIMBY Education Fund page

Here is how tools diagnose the ID not unique issue for HTML element 304 of the California YIMBY Education Fund page.

Basics

• About the ID not unique issue
  • Why it matters: User may be pointed to the wrong item
  • Priority: highest
  • Related WCAG standard: 4.1.1
• About the California YIMBY Education Fund page
  • URL: https://cayimby.org/
  • Tested on 2026-04-02 at 14:22
• About HTML element 304
  • Tag name: FORM
  • Text: Sign Up
  • Start tag: <form id="an_form">
  • XPath: /html/body/div[1]/footer[1]/div[1]/div[1]/div[1]/div[2]/form[1]
  • Bounding box: x = 1028, y = 3871, width = 540, height = 48

Diagnoses

1. The element does not have a unique ID

   Tool: Alfa (Siteimprove)

   Rule: r3

2. Attribute <code>id="email"</code> should be unique. It has been defined 2 times.

   Tool: ASLint (eSSENTIAL Accessibility)

   Rule: duplicated_id_attribute

3. Duplicate id attribute value "an_form" found on the web page.

   Tool: HTML CodeSniffer (Squiz Labs)

   Rule: E-WCAG2AAA.Principle4.Guideline4_1.4_1_1.F77

4. Duplicate ID an_form.

   Tool: Html Checker API (World Wide Web Consortium)

5. Duplicate id attribute value "an_form" found on the web page.

   Tool: WallyAX (Wally)