我已经尝试了许多不同的组合来使其正常工作,但是它并没有应用我为StyledLines
组件编写的样式,因为他们认为它们可以正常工作!将StyledLines
组件用作子组件将无法正常工作。 Target
组件样式按预期工作。
import React, { Fragment, FunctionComponent } from 'react';
import styled from '@emotion/styled';
interface Crosshair {
size: number;
thickness: number;
}
const Target = styled.div<Crosshair>`
position:absolute;
&:before {
content: '';
display:block;
position:absolute;
top:50%;
left:50%;
background-color:transparent;
border-color:#2fd5d5;
margin-left:-${({size}) => size / 4}px;
margin-top:-${({thickness}) => thickness / 4}px;
width:${({size}) => size / 2}px;
height:${({thickness}) => thickness / 2}px;
}
`;
const Lines: FunctionComponent = ({children}) => <div className="line">{children}</div>;
const StyledLines = styled(Lines)<Crosshair>`
position:absolute;
&:nth-of-type(1) {
top:0;
left:0;
}
&:nth-of-type(2) {
top:0;
right:0;
}
&:nth-of-type(3) {
bottom:0;
right:0;
}
&:nth-of-type(4) {
bottom:0;
left:0;
}
&:after, &:before {
content: '';
display:block;
position:absolute;
top:50%;
left:50%;
background:#2fd5d5;
margin-left:-${({size = 2}) => size / 2}px;
margin-top:-${({thickness = 24}) => thickness / 2}px;
width:${({size = 2}) => size}px;
height:${({thickness = 24}) => thickness}px;
}
&:before {
transform: rotateZ(90deg);
}
`;
export default function Crosshairs() {
return <Fragment>
<div>
{[0,1,2,3].map(i => <StyledLines key={i} size={24} thickness={2}>
<Target size={24} thickness={2} />
</StyledLines>)}
</div>
</Fragment>;
}
答案 0 :(得分:1)
Lines
是一个普通的React组件,而不是样式化的组件,因此您必须将className
属性传递给要设置样式的DOM部分:
const Lines: FunctionComponent = ({children, className}) => <div className={`line ${className}`}>{children}</div>;