chromium/chrome/browser/resources/ash/settings/internal/storybook/settings_dropdown_v2_storybook.html

<style include="storybook-styles">
</style>

<h2>Basic</h2>
<settings-dropdown-v2
    value="[[basicDropdownValue_]]"
    options="[[dropdownOptions_]]"
    on-change="onBasicDropdownChange_"
    disabled="[[basicDropdownDisabled_]]"
    aria-label="A11y label"
    aria-description="A11y description">
</settings-dropdown-v2>

<cr-checkbox checked="{{basicDropdownDisabled_}}">Disabled</cr-checkbox>

<code>
  <div>Value: [[basicDropdownValue_]]</div>
</code>

<h2>Managed (via pref)</h2>
<settings-dropdown-v2
    pref="[[virtualManagedPref_]]"
    options="[[dropdownOptions_]]">
</settings-dropdown-v2>