我正在尝试构建一个显示在某些文本中的单词上方的工具提示。如果工具提示 div 始终具有相同的高度,则效果很好。但有时我想在那里有大量的文字或其他东西,有时可能是单行句子。
我被困在这里如何编码定位,因为我需要工具提示的高度?我希望工具提示 div 始终位于目标词上方的中心,并且我希望工具提示的宽度和高度完全可变,并且永远不会与目标词重叠。
到目前为止,我所拥有的是:
const wordWithToolTip = ({ word, tooltip }) => {
return (
<div
style={{ display: 'inline-block', position: 'relative', border: '2px solid red' }}
onMouseEnter={() => setShowTranslation(true)}
onMouseLeave={() => setShowTranslation(false)}>
{showTranslation && (
<div
style={{
position: 'absolute',
top: '-30px', //this works fine, but I cannot assume that 30px will always suffice. If the tooltip div gets really big, -30px won't do anything and it will overlap the word and look off. Ideally, I'd have something that says: always appear 10px above the word, and go as high as you want, but never below those 10px etc.
padding: '2px',
border: '2px solid black',
backgroundColor: 'white',
}}>
{tooltip}
</div>
)}
<span>{word}</span>
</div>
);
};
答案 0 :(得分:0)
为了实现这一点,您需要为工具提示元素的高度设置状态,然后相应地调整 top
css 属性。像这样的事情会起作用:
const wordWithToolTip = ({ word, tooltip }) => {
const [height, setHeight] = useState("");
const tooltipEl = useRef(null);
useEffect(() => {
const refheight = tooltipEl.current.offsetHeight;
setHeight({ refheight });
}, []);
return (
<div
style={{ display: 'inline-block', position: 'relative', border: '2px solid red' }}
onMouseEnter={() => setShowTranslation(true)}
onMouseLeave={() => setShowTranslation(false)}>
{showTranslation && (
<div
ref={tooltip}
style={{
position: 'absolute',
top: '-' + height+10 + 'px', //You'll have to adjust this accordingly.
padding: '2px',
border: '2px solid black',
backgroundColor: 'white',
}}>
{tooltip}
</div>
)}
<span>{word}</span>
</div>
);
};
10 代表从工具提示到单词的边距。