Typescript React组件类型不匹配

Question

在使用任意数量的props定义任何类型的简单react功能组件时出现typescript错误，包括使用FC, ComponentWithChildren等…

这是一个最小的复制

type Props = {
className?: string;
};
const Horizontal: Props = ({ className = undefined }) => (
<div />
);

给出错误

Type '({className}: {className?:定义;}) =比;元素'与'Props'类型没有共同的属性。ts(2559)

我不明白这就是我总是如何定义组件的。打字稿中有什么我不知道的新东西吗?

{
"name": "call-mvp",
"version": "0.1.0",
"private": true,
"dependencies": {
"@testing-library/jest-dom": "^5.16.4",
"@testing-library/react": "^13.2.0",
"@testing-library/user-event": "^13.5.0",
"@types/classnames": "^2.3.1",
"@types/jest": "^27.5.1",
"@types/node": "^16.11.36",
"@types/react": "^18.0.9",
"@types/react-dom": "^18.0.4",
"@types/react-measure": "^2.0.8",
"@types/react-router-dom": "^5.3.3",
"@types/styled-components": "^5.1.25",
"classnames": "^2.3.1",
"react": "^18.1.0",
"react-dom": "^18.1.0",
"react-measure": "^2.5.2",
"react-router-dom": "^6.3.0",
"react-scripts": "5.0.1",
"styled-components": "^5.3.5",
"typescript": "^4.6.4",
"web-vitals": "^2.1.4"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"eslintConfig": {
"extends": [
"react-app",
"react-app/jest"
]
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
}
}

Answer 1

可以改成:

const Horizontal: FC = ({ className = undefined } : Props)

Answer 2

应该可以:

const Horizontal = ({ className = undefined } : Props) => ....