govuk-frontend/dist/govuk/components/input/template-with-autocomplete-attribute.html

GOV.UK Frontend contains the code you need to start building a user interface for government platforms and services.

<div class="govuk-form-group">
  <label class="govuk-label" for="input-with-autocomplete-attribute">
    Postcode
  </label>
  <input class="govuk-input" id="input-with-autocomplete-attribute" name="postcode" type="text" autocomplete="postal-code">
</div>