[英]Hiding child component on hover state of parent using styled-component
我有一個像這樣的反應組件 -
const MyComponent = () => (
<ContainerSection>
<DeleteButtonContainer>
<Button
theme="plain"
autoWidth
onClick={() => {
onDeleteClick();
}}
>
Delete
</Button>
</DeleteButtonContainer>
</ContainerSection>
);
我只想在用戶將鼠標懸停在ContainerSection
上時顯示DeleteButtonContainer
。 它們都是styled-components
。 I couldn't find any way to do it using just css (using hover state of parent inside child), so I used something like this using state -
const MyComponent = ()=>{
const [isHoveredState, setHoveredState] = useState<boolean>(false);
return (<ContainerSection onMouseEnter={() => setHoveredState(true)} onMouseLeave={() => setHoveredState(false)}>
<DeleteButtonContainer style={{ display: isHoveredState ? 'block' : 'none' }}>
<Button
theme="plain"
autoWidth
disabled={!isHoveredState}
onClick={() => {
onDeleteClick();
}}
>
Delete
</Button>
</DeleteButtonContainer>
</ContainerSection>)
};
現在我想在移動設備上始終顯示DeleteButtonContainer
,因為它沒有 hover。 我知道我總是可以糾正更多的 JS 來實現這一點,但我想使用 CSS 來做到這一點,如果可能的話,我想完全刪除 state。
那么有沒有辦法只使用樣式化的組件而不是編寫自定義 JS 來實現這一點?
您可以在另一個組件中引用一個組件,並使用媒體查詢來啟用非移動分辨率的規則。
Hover 金色條看到按鈕,並縮小寬度以禁用 hover 規則。
const DeleteButtonContainer = styled.div``; const ContainerSection = styled.div` height: 2em; background: gold; @media (min-width: 640px) { // when resolution is above 640px &:not(:hover) ${DeleteButtonContainer} { // if DeleteButtonContainer is not under an hovered ContainerSection display: none; } } `; const Button = styled.button``; const MyComponent = () => ( <ContainerSection> <DeleteButtonContainer> <Button> Delete </Button> </DeleteButtonContainer> </ContainerSection> ); ReactDOM.render( <MyComponent />, root );
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/styled-components/4.4.0/styled-components.js"></script> <div id="root"></div>
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