就在这里,我有一段代码,当输入被选中时,我改变了标签的背景,但是标签就在输入之后,如下面的例子所示。
const Label = styled.label`
background: red;
display: block;
padding: 1rem;
`;
const Input = styled.input`
&:checked + ${Label} {
background: blue;
}
`;
const App = () => (
<div>
<Input id="input" type="checkbox" />
<Label for="input" />
</div>
);
但是如果输入在标签内,怎么可能改变标签背景呢?如下例所示:
const App = () => (
<div>
<Label for="input" />
<Input id="input" type="checkbox" />
</Label>
</div>
);
你不能在css中像styled-components
一样使用bubbling stage
。但是你可以从input
得到事件,然后传入styled-component
。示例
import { useState } from "react";
import styled from "styled-components";
const Label = styled.label`
background: ${({ checked }) => (checked ? "blue" : "red")};
display: block;
padding: 1rem;
`;
const Input = styled.input`
/* &:checked + ${Label} {
background: blue;
} */
`;
export default function App() {
const [checked, setChecked] = useState(false);
const toggle = () => setChecked(!checked);
return (
<div className="App">
<Label for="input" checked={checked}>
<Input id="input" type="checkbox" onChange={toggle} />
</Label>
</div>
);
}