What is proper TypeScript type for Button click event?

In the example here:  https://www.telerik.com/kendo-react-ui/components/buttons/button/

you use the "any" type for the event return.  What is the proper  type to use, and if "any" is really correct, please explain why.  I usually think of "any" as the type to use when I don't understand what the proper type I should be using is. (same with newLogs though I'm not using logs, just seems unusual to see "any" used in library docs)

const ButtonContainer = () => {
  const [logs, setLogs] = React.useState([]);

  const handleDomEvent = (event: any) => {
    let newLogs: any = logs.slice();

    newLogs.unshift(event.type);

    setLogs(logs);
  };
  return (
    <>
      <Button
        onClick={handleDomEvent}
        onMouseDown={handleDomEvent}
        onMouseUp={handleDomEvent}
        onFocus={handleDomEvent}
        onBlur={handleDomEvent}
        onKeyPress={handleDomEvent}
      >
        My Button
      </Button>
      <EventLog title="Event Log" logs={logs} />
    </>
  );
};