Input URL
A URL input with native browser URL validation. Provides an optimised keyboard on mobile and supports autocomplete for web addresses.
Keyboard interaction
| Key | Action |
|---|---|
| Tab | Move focus to the input. |
| Shift + Tab | Move focus away from the input to the previous element. |
| Type | Enter a URL directly into the field. |
| Enter | Submit the enclosing form (if any). |
Screen reader behaviour
The following ARIA attributes are managed internally by the component:
| Property | Value | Note |
|---|---|---|
aria-required | "true" when required is set | Communicates the required state to assistive technologies. |
aria-invalid | "true" when state="error" | Signals a validation failure. Paired with aria-describedby pointing at the error message. |
aria-describedby | ID of the message or description element | Links the error or description text to the input so screen readers announce it on focus. |
aria-label / aria-labelledby | From label prop | Associates the visible label with the inner <input type="url"> via Shadow DOM id association. |
Label association
The label is paired with the inner <input type="url"> via Shadow DOM id association. Use hideLabel to visually hide it while retaining its accessible name.
Input type semantics
type="url" enables native URL format validation (requires a scheme such as https://). Mobile browsers may present a keyboard layout optimised for URL entry with / and . shortcuts.
Required fields
required adds a visual asterisk and aria-required="true" on the inner input.
Validation state
state="error" sets aria-invalid="true". The message is linked via aria-describedby and announced by screen readers after the field label.
Focus management
delegatesFocus: true forwards host focus to the inner input. Reduced-motion styles respect prefers-reduced-motion.
WCAG 2.2 compliance
1.3.1 Info and Relationships — APass
Label, required indicator, and error message are all programmatically associated with the input via ARIA attributes.
1.4.3 Contrast (Minimum) — AAPass
Input text and label foreground colours meet the 4.5:1 minimum contrast ratio against the field background in both themes.
2.1.1 Keyboard — APass
All functionality is operable via keyboard.
2.4.7 Focus Visible — AAPass
A visible focus ring is applied on keyboard focus using :focus-visible styles.
3.3.1 Error Identification — APass
When state="error", the error message is linked via aria-describedby so screen readers announce it on focus.
4.1.2 Name, Role, Value — APass
The inner <input type="url"> exposes correct name, role, and value to assistive technologies via delegated focus and ARIA labelling.
Best practices
- Reduced motion — all CSS transitions inside the shadow DOM respond to
prefers-reduced-motion: reduceand are suppressed automatically. - URL format guidance — inform users of the expected format using the
descriptionprop. Browsers require a scheme such ashttps://— omitting it may cause confusing validation errors. - Error messaging — always pair
state="error"with a meaningfulmessageprop. Colour alone is insufficient for users who cannot distinguish red from other colours.