chromium/ash/webui/diagnostics_ui/resources/diagnostics_network_icon.html

<style include="diagnostics-shared">
  :host {
    --cros-icon-color-primary: var(--cros-icon-color-secondary);
  }

  :host-context(body.jelly-enabled) #connectingIcon {
    --paper-spinner-color: var(--cros-sys-progress);
  }

  #connectingIcon {
    height: 20px;
    width: 20px;
  }
</style>
<div id="iconContainer" hidden$="[[!network]]">
  <network-icon id="networkIcon"
      hidden$="[[computeShouldDisplaySpinner(network.state)]]"
      network-state="[[computeNetworkState(network.*)]]">
  </network-icon>
  <paper-spinner-lite id="connectingIcon" active tabindex="0"
      alt$="[[computeSpinnerAriaLabel(locale, network.state)]]"
      hidden$="[[!computeShouldDisplaySpinner(network.state)]]">
  </paper-spinner-lite>
</div>