![](/img/trans.png)
[英]How to render a conditional component in a Test file? React Testing Library
[英]how to conditional render a styled component in react?
我有一個styled-component
,我只想在屏幕尺寸大於 480 時才渲染它。我嘗試通過獲取對元素的引用並禁用它來做到這一點。 但這沒有用。 我將display
屬性設置為none
,但按鈕仍然存在,它是可點擊的。
這是我的代碼
console.log(window.screen.width);
if(window.screen.width <= 480) {
var a = document.getElementsByClassName("Button1")
...
...
...
...
}
return (
<>
<div className="control">
<Circle onClick={handleVideoToggle}>
<img src={video ? Video : VideoOff} />
</Circle>
<Circle onClick={handleAudioToggle}>
<img src={audio ? Mic : MicOff} />
</Circle>
<Circle onClick={handleScreenToggle}>
<img className = "Button1" src={screen ? Screen : ScreenOff} />
</Circle>
<Circle onClick={handleCallDisconnect}>
<img src={End} />
</Circle>
</div>
</>
);
};
export default Controls;
const
Circle = styled.div`
width: 45px;
height: 45px;
border-radius: 50%;
display: flex;
cursor: pointer;
:not(:first-child) {
margin-left: 20px;
}
`,
Image = styled.img`
max-width: 100%;
width: 45px;
margin: 0 auto;
`;
刪除 if 語句並使其與 css 媒體查詢一起使用:
const Circle = styled.div`
width: 45px;
height: 45px;
border-radius: 50%;
display: flex;
cursor: pointer;
@media only screen and (max-width: 480px){
display: none;
}
:not(:first-child) {
margin-left: 20px;
}
`,
它仍然是可點擊的,因為您為 Curcle 組件而不是 img 設置了 OnClick 處理程序
您可以刪除頂部的“if”塊。 您可以有條件地在返回的內容中包含 Circle/Button,如下所示:
const isSmall = window.screen.width <= 480;
return (
<>
<div className="control">
<Circle onClick={handleVideoToggle}>
<img src={video ? Video : VideoOff} />
</Circle>
<Circle onClick={handleAudioToggle}>
<img src={audio ? Mic : MicOff} />
</Circle>
{!isSmall && (<Circle onClick={handleScreenToggle}>
<img className = "Button1" src={screen ? Screen : ScreenOff} />
</Circle>)
}
<Circle onClick={handleCallDisconnect}>
<img src={End} />
</Circle>
</div>
</>
);
您可以有條件地在 react 中渲染 StyledComponent,如下所示。 但是對於引用一個元素,您可以使用 react ref
而不是document.getElementsByClassName("Button1")
。
console.log(window.screen.width); const isAbove480 = window.screen.width > 480; return ( <> <div className="control"> <Circle onClick={handleVideoToggle}> <img src={video? Video: VideoOff} /> </Circle> <Circle onClick={handleAudioToggle}> <img src={audio? Mic: MicOff} /> </Circle> { isAbove480? (<Circle onClick={handleScreenToggle}> <img className = "Button1" src={screen? Screen: ScreenOff} /> </Circle>): null } <Circle onClick={handleCallDisconnect}> <img src={End} /> </Circle> </div> </> ); }; export default Controls; const Circle = styled.div` width: 45px; height: 45px; border-radius: 50%; display: flex; cursor: pointer; :not(:first-child) { margin-left: 20px; } `, Image = styled.img` max-width: 100%; width: 45px; margin: 0 auto; `;
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.