Identify Input Purpose
Input fields collecting information about the user (name, email, address, phone, billing) must declare their purpose using HTML autocomplete attributes.
What it requires
WCAG 2.1 SC 1.3.5 requires that user-input fields with predefined data types use the corresponding `autocomplete` attribute value (e.g., `autocomplete="email"`, `autocomplete="tel"`, `autocomplete="address-line1"`).
This helps users with motor and cognitive disabilities by enabling browser autofill, password managers, and assistive-tech extensions to identify the field's purpose. It also reduces typing burden for everyone.
Common Shopify failure
Checkout shipping address form without `autocomplete` attributes — autofill cannot pre-populate. Account signup with `autocomplete="off"` to "discourage password managers" (which is a 1.3.5 violation).
How to fix it
Add `autocomplete="email"`, `"tel"`, `"address-line1"`, `"postal-code"`, `"country"` to the corresponding fields. Remove `autocomplete="off"` on signup forms.
Primary source: W3C — WCAG 2.1 Understanding 1.3.5