<ox-icon
  name="add"          // required
  family="ui"       // optional
></ox-icon>

// set automatically by `import 'oxide-icons'`
OxIconElement.manifest;         // Manifest
OxIconElement.registry;         // Registry
OxIconElement.renderer;         // SvgIconRenderer
OxIconElement.isolationPolicy;  // IsolationPolicy

document.addEventListener('oxide-icon-error', (event) => {
  console.error(event.detail); // the underlying Error
});