前端检测到省略号文本自动显示Tooltip的方法技巧

// tailwind的样式单行省略
.line-clamp-1 {  
    overflow: hidden;  
    display: -webkit-box;  
    -webkit-box-orient: vertical;  
    -webkit-line-clamp: 1;  
}

// 自行设置的css样式
single-line {
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

import { useEffect, useRef, useState } from 'react';

type Options = {
  lines?: number; // 支持多行
};

export function useEllipsis<T extends HTMLElement>({
  lines = 1,
}: Options = {}) {
  const ref = useRef<T>(null);
  const [isEllipsis, setIsEllipsis] = useState(false);

  useEffect(() => {
    const el = ref.current;
    if (!el) return;

    const check = () => {
      if (lines === 1) {
        setIsEllipsis(el.scrollWidth > el.clientWidth);
      } else {
        setIsEllipsis(el.scrollHeight > el.clientHeight);
      }
    };

    check();
    window.addEventListener('resize', check);
    return () => {
      window.removeEventListener('resize', check);
    };
  }, [lines]);

  return { ref, isEllipsis };
}

import { Tooltip } from '@arco-design/web-react'; // 或 antd / 你自己的库
import { useEllipsis } from '@/hooks/use-ellipsis.ts';
import { cn } from '@/lib/utils.ts';

type EllipsisTooltipProps = {
  text: string;
  className?: string;
  onClick?: () => void;
  lines?: number;
};

export const EllipsisTooltip: React.FC<EllipsisTooltipProps> = ({
  text,
  className,
  onClick,
  lines = 1,
}) => {
  const { ref, isEllipsis } = useEllipsis<HTMLDivElement>({ lines });

  const lineClass =
    lines === 1 ? 'truncate whitespace-nowrap' : `line-clamp-${lines}`;

  const content = (
    <div ref={ref} className={cn(lineClass, className)} onClick={onClick}>
      {text}
    </div>
  );

  return (
    <Tooltip content={text} disabled={!isEllipsis} unmountOnExit={false}>
      {content}
    </Tooltip>
  );
};

export default function TestPage() {
  const mockText = '很长很长很长很长很长';
  const mockText2 = '简短的';
  return (
    <>
      <EllipsisTooltip className='w-28' text={mockText} />
      <EllipsisTooltip text={mockText2} />
    </>
  );
}