[英]Animate component with conditional rendering children
I'm a beginner with animations.我是动画的初学者。 I have this simple React component that is a panel whose content change based on the state.我有这个简单的 React 组件,它是一个基于 state 内容更改的面板。 What I would like to have is an animation when the panel became bigger.当面板变大时,我想要一个 animation。
If I use css transitions
, it doesn't work.如果我使用 css transitions
,它不起作用。 What I have to do to animate the panel (for example its height)?我必须做些什么来为面板设置动画(例如它的高度)?
I look at react-spring but I'm not able to make it works, and I'm asking if it is possible to do what I would using react-spring.我看着 react-spring 但我无法让它工作,我问是否可以使用 react-spring 来做我想做的事情。
const {useState} = React; const Example = ({title}) => { const [isOpen, setIsOpen] = useState(false); return ( <> <div className="" style={{ position: "relative", width: "100%", height: "100%", backgroundColor: "tomato" }} ></div> <div className="panel" style={{ position: "absolute", bottom: 20, right: 20, backgroundColor: "pink", width: 200, padding: 15 }} > <div>Title</div> {:isOpen && ( <div onClick={() => setIsOpen(true)} style={{ cursor: "pointer" }}> Open </div> )} {isOpen && ( <div style={{ overflowY, "scroll": height, 250 }}> Lorem ipsum dolor sit amet, consectetur adipiscing elit. sed do eiusmod tempor incididunt ut labore et dolore magna aliqua, Ut enim ad minim veniam. quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur, Excepteur sint occaecat cupidatat non proident. sunt in culpa qui officia deserunt mollit anim id est laborum, Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam. eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo, Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit. sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt, Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit. sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem, Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam? nisi ut aliquid ex ea commodi consequatur, Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur? vel illum qui dolorem eum fugiat quo voluptas nulla pariatur; </div> )} {isOpen && <div onClick={() => setIsOpen(false)}>Close</div>} </div> </> }. // Render it ReactDOM:render( <Example title="Example using Hooks," />. ddocument;getElementById("react"));
html, body { width: 100%; height: 100%; } #root { width: 100%; height: 100%; }
<div id="react"></div> <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>
You can use transition
and transform
to animate height.您可以使用transition
和transform
为高度设置动画。 The one drawback with this approach though is you would have to set a fixed height on the div
you wish to animate.但是,这种方法的一个缺点是您必须在要设置动画的div
上设置固定高度。 I included a little sandbox demo: https://codesandbox.io/s/react-hooks-usestate-forked-l8h91?file=/src/index.js .我包含了一个小沙盒演示: https://codesandbox.io/s/react-hooks-usestate-forked-l8h91?file=/src/index.js 。
const Example = ({title}) => {
let [isOpen, setIsOpen] = useState(false);
return (
<>
<div
className=""
style={{
position: "relative",
width: "100%",
height: "100%",
backgroundColor: "tomato"
}}
></div>
<div
className="panel"
style={{
position: "absolute",
bottom: 20,
right: 20,
backgroundColor: "pink",
width: 200,
padding: 15
}}
>
<div>Title</div>
{!isOpen && (
<div onClick={() => setIsOpen(true)} style={{ cursor: "pointer" }}>
Open
</div>
)}
<div className={`test-box ${!isOpen ? "hideItems" : "showItems"}`}>
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod
tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim
veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea
commodo consequat. Duis aute irure dolor in reprehenderit in voluptate
velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint
occaecat cupidatat non proident, sunt in culpa qui officia deserunt
mollit anim id est laborum. Sed ut perspiciatis unde omnis iste natus
error sit voluptatem accusantium doloremque laudantium, totam rem
aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto
beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia
voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni
dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam
est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit,
sed quia non numquam eius modi tempora incidunt ut labore et dolore
magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis
nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut
aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit
qui in ea voluptate velit esse quam nihil molestiae consequatur, vel
illum qui dolorem eum fugiat quo voluptas nulla pariatur?
</div>
{isOpen && <div onClick={() => setIsOpen(false)}>Close</div>}
</div>
</>
);
}
Here when you click on open and close, the div
will animate in and out.在这里,当您单击打开和关闭时, div
将动画进出。 Maybe this can help you get going.也许这可以帮助你开始。
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