Grepping a real world codebase that would not be `unsafe` in Rust:

  event as CustomEvent<T>

  const errorEvent = event as ErrorEvent;

  const element = getByRole("textbox");
  expect(element).toBeInstanceOf(HTMLInputElement);
  const input = element as HTMLInputElement;

  const element = parent.firstElementChild as HTMLElement;

  type ItemMap = Map<Item["id"], Item>;
  ...
  new Map() as ItemMap

  const clusterSource = this.map.getSource(sourceName) as GeoJSONSource;

  [K in keyof T as T[K] extends Fn ? K : never]: T[K];

  target[type] as unknown as Fn<...

  export const Foo = [1,2,3] as const;