Kilotest: Diagnoses of ID not unique violation by HTML element 474 on Center for Democracy and Technology page

Basics

About the Center for Democracy and Technology page

• URL: https://cdt.org/
• Tested 34 days ago by job ocb on 2026-04-28 at 16:47

About HTML element 474

• Tag name: svg
• Text: [not applicable]
• Start tag: <svg class="icon icon-twitter_x" role="image" version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 448 512" style="enable-background:new 0 0 448 512;" xml:space="preserve">
• XPath: /html/body/footer[1]/div[2]/div[2]/ul[2]/li[1]/a[1]/svg[1]
• Bounding box: x = 1675, y = 7829, width = 22, height = 22

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

Diagnoses

Here is how tools diagnose the ID not unique issue for HTML element 474 of the Center for Democracy and Technology page.

1. Duplicate id attribute value "Layer_1" found on the web page.

   Tool: HTML CodeSniffer (Squiz Labs)

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

2. Duplicate ID Layer_1.

   Tool: Html Checker API (World Wide Web Consortium)

3. [failed]

   Tool: QualWeb (University of Lisbon)

   Rule: QW-BP30