How to fix aria valid attr value on Adobe Commerce (Magento)

Steps for Adobe Commerce (Magento)

1. Identify the PHTML template or JavaScript UI component responsible for the failing element using browser DevTools (right-click → Inspect to see the element, then trace to the template via layout XML).
2. Locate the file in your custom theme under app/design/frontend/<Vendor>/<Theme>/ — copy the core file into your theme directory if it does not already exist there (never edit core files directly).
3. Open the PHTML or .js file in your code editor and find the ARIA attribute; fix the ID reference or keyword value.
4. For JavaScript-rendered components (e.g., Knockout.js or React widgets), search the corresponding .js or .html knockout template file for the attribute binding and correct it.
5. Run bin/magento cache:clean && bin/magento cache:flush after saving, then reload the page and verify with the axe DevTools browser extension.

<!-- WRONG: aria-labelledby points to an ID that doesn't exist -->
<button aria-labelledby="prodcut-title">Add to Cart</button>

<!-- WRONG: aria-live has an invalid value -->
<div aria-live="yes">Updating cart…</div>

<!-- CORRECT: aria-labelledby matches a real element ID exactly -->
<h1 id="product-title">Blue Wool Scarf</h1>
<button aria-labelledby="product-title">Add to Cart</button>

<!-- CORRECT: aria-live uses an allowed keyword -->
<div aria-live="polite">Updating cart…</div>

<!-- CORRECT: aria-describedby references an existing element -->
<input type="email" id="email" aria-describedby="email-hint" />
<span id="email-hint">We'll never share your email.</span>

What is aria valid attr value?

ARIA (Accessible Rich Internet Applications) attributes are special HTML attributes — like `aria-labelledby`, `aria-describedby`, `aria-controls`, and `aria-activedescendant` — that give screen readers and other assistive technologies extra information about how elements on a page work and relate to each other. Many of these attributes must contain a valid value to be meaningful: for example, `aria-labelledby="product-title"` only works if an element with the id `product-title` actually exists in the page. When an ARIA attribute is given an invalid value — a misspelled ID, a blank string, a value that doesn't exist, or a value that's not in the allowed list for that attribute — the browser and screen reader can't use it, making that element confusing or invisible to users who rely on assistive technology. WCAG Success Criterion 4.1.2 requires that all user interface components have programmatically determinable names, roles, and values — and broken ARIA values directly violate this requirement.

Screen reader users — including many people with visual, motor, or cognitive disabilities — depend entirely on correctly coded ARIA to understand interactive components like modals, dropdowns, carousels, tabs, and forms. A broken `aria-labelledby` value, for example, means a blind shopper hears nothing when their screen reader focuses on your "Add to Cart" button or product image. Beyond the direct user impact, WCAG 4.1.2 is a Level A requirement — the baseline — so violations expose your store to accessibility complaints and legal risk in jurisdictions like the US (ADA), UK (Equality Act), and EU (European Accessibility Act). Google also uses accessibility signals as part of overall page-quality evaluation, so a more accessible, error-free store can benefit organic rankings over time. Fixing invalid ARIA values is a targeted, low-cost change that directly improves the experience for millions of assistive-technology users worldwide.

See the complete Aria valid attr value guide for every platform and the full background.