text-overflow: ellipsis;

https://webisfree.com/2015-08-17/[css]-text-overflow-%ED%85%8D%EC%8A%A4%ED%8A%B8%EA%B0%80-%EB%A7%8E%EC%9D%80-%EA%B2%BD%EC%9A%B0-%EC%83%9D%EB%9E%B5%EA%B8%B0%ED%98%B8%EB%A1%9C-%EB%B3%B4%EC%97%AC%EC%A3%BC%EA%B8%B0