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CVV Input Component

<primer-input-cvv>​

The CVV Input component provides a secure, PCI-compliant field for collecting payment card security codes (CVV/CVC). It integrates with the card form validation system and maintains a consistent user experience.

This component extends the AbstractCardInputComponent class and uses a secure iframe-based input for PCI compliance.

Usage​

The CVV Input component must be used within a primer-card-form container:

<primer-card-form>
  <primer-input-cvv></primer-input-cvv>
</primer-card-form>

Properties​

PropertyAttributeTypeDefaultDescription
labellabelstring"CVV"The label displayed above the input
placeholderplaceholderstring"123"Placeholder text shown when input is empty
``aria-labelstring"CVV"Accessibility label for screen readers

Property Behavior​

  • label: If not explicitly set, uses the localized default value ("CVV"). If set to an empty string "", reverts to the default.
  • placeholder: If not explicitly set, uses the default value ("123"). When explicitly set to an empty string "", no placeholder will be displayed.
  • aria-label: If not explicitly set, uses the value of label. If explicitly set to an empty string "", reverts to using the label value.

Technical Implementation​

The CVV Input component:

  1. Connects to the card form context to access validation state and hosted inputs
  2. Uses display: contents to seamlessly integrate with parent layout without creating a new box in the DOM
  3. Automatically handles validation by detecting errors from the card form context

Events​

This component doesn't emit custom events directly. Card validation events are handled through the parent primer-card-form component. Internal focus and blur events are captured to manage visual states.

DOM Structure​

The component renders the following DOM structure:

<primer-input-wrapper>
  <primer-input-label slot="label">CVV</primer-input-label>
  <div slot="input" id="cvv">
    <!-- Secure iframe-based input rendered here -->
  </div>
  <!-- Error message appears here when validation fails -->
</primer-input-wrapper>

Examples​

<primer-card-form>
  <primer-input-cvv></primer-input-cvv>
</primer-card-form>
<primer-card-form>
  <primer-input-cvv
    label="Security Code"
    placeholder="CVV"
    aria-label="Your card's security code"
  >
  </primer-input-cvv>
</primer-card-form>
<primer-card-form>
  <div slot="card-form-content">
    <primer-input-card-number></primer-input-card-number>
    <div style="display: flex; gap: 8px;">
      <primer-input-card-expiry></primer-input-card-expiry>
      <primer-input-cvv></primer-input-cvv>
    </div>
    <button type="submit">Pay Now</button>
  </div>
</primer-card-form>

Key Considerations​

Component Dependencies
  • The CVV Input component must be placed inside a primer-card-form component
  • For best UI experience, consider pairing this component with primer-input-card-expiry in a flex layout
Implementation Details
  • Input validation happens automatically when the form is submitted
  • Validation errors are displayed below the input field when they occur
  • The component handles focus events internally to update the wrapper's visual state
Security Note

The CVV input is rendered in a secure iframe to prevent exposure of sensitive payment details, ensuring PCI compliance