All WCAG criteria
WCAG 2.1·Robust·4.1 Compatible
4.1.1 Parsing
Level AMarkup must be valid: complete tags, no duplicate IDs, properly nested elements. (Removed in WCAG 2.2.)
Why it matters
Modern parsers tolerate broken markup, but assistive tech still struggles with malformed HTML.
Common failure
<div id="main"><span>...</div></span>
Accessible version
<div id="main"><span>...</span></div>
How OnlyEnable handles this
Source-code fix required. No widget can solve this — it requires changes to your content or markup. Our remediation team can help.