'useState'已定义但从未使用过，即使我使用了使用状态钩子

Question

我有一个简单的功能组件，如下所示。

import React, { useState } from 'react';
import { connect } from 'react-redux';
import JoinRoomInputs from '../../../components/JoinRoomPage/JoinRoomInputs/JoinRoomInputs';
import { State } from '../../../store/states/states';
interface Props {
isRoomHost: boolean;
}
const JoinRoomContent = ({ isRoomHost }:Props) => {
const [roomIdValue, setRoomIdValue] = useState('');
const [nameValue, setNameValue] = useState('');
return (
<>
<JoinRoomInputs roomIdValue={roomIdValue} setRoomIdValue={setRoomIdValue} nameValue={nameValue} setNameValue={setNameValue} isRoomHost={isRoomHost} />
</>
);
};
const mapStateToProps = (state:State) => {
return {
...state
}
}
export default connect(mapStateToProps)(JoinRoomContent);

正如您所看到的，我在的两行中使用了useState钩子。但我收到了黄色警告。

srccomponentsJoinRoomPageJoinRoomContentJoinRoomContent.tsx
Line 1:17:  'useState' is defined but never used  @typescript-eslint/no-unused-vars
Search for the keywords to learn more about each warning.
To ignore, add // eslint-disable-next-line to the line before.

更奇怪的是，第17行是这个);

这对我来说毫无意义。

我在这里做错了什么？

下面是我的包.json

{
"name": "client",
"version": "0.1.0",
"private": true,
"dependencies": {
"@reduxjs/toolkit": "^1.6.2",
"@testing-library/jest-dom": "^4.2.4",
"@testing-library/react": "^9.5.0",
"@testing-library/user-event": "^7.2.1",
"@types/jest": "^24.9.1",
"@types/node": "^12.20.36",
"@types/react": "^16.14.20",
"@types/react-dom": "^16.9.14",
"@types/react-redux": "^7.1.20",
"react": "^17.0.2",
"react-dom": "^17.0.2",
"react-redux": "^7.2.6",
"react-router-dom": "^6.0.2",
"react-scripts": "4.0.3",
"typescript": "^4.1.6"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"eject": "react-scripts eject"
},
"eslintConfig": {
"extends": "react-app"
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
},
"devDependencies": {
"typescript-plugin-css-modules": "^3.4.0"
}
}

Answer 1

使用以下命令重新启动服务器或终止端口：

sudo kill $(sudo lsof -t -i:PORT)

Answer 2

使用以下命令运行react应用程序：

npm run start

或者尝试第二种方法：

npm start