<def tag="js-wrapper" attrs="convert">
  <set-scoped vals="&[]">
    <do param="default" />
    <% if convert %>
      <%= "[#{scope.vals.*.inspect.join(', ')}]" %>
    <% else %>
      <% scope.retval = scope.vals %>
    <% end %>
  </set-scoped>
</def>

<def tag="hash-param" attrs="key">
  <set-scoped retval="">
    <% value = parameters.default %>
    <% value = scope.retval if value.blank? %>
    <% scope.vals << Hash[key, value] %>
  </set-scoped>
</def>

<def tag="array-param">
  <set-scoped retval="">
    <% value = parameters.default %>
    <% value = scope.retval if value.blank? %>
    <% scope.vals << value %>
  </set-scoped>
</def>