如何使用 React 设置 Eslint

Question

我将 webpack 与 React 和 Eslint 一起使用，我已经在 Eslint 上设置了扩展，但是，它仍然显示 'React' is defined but never used.eslintno-unused-vars

这是我的 .eslintrc 文件：

{
    "parser": "babel-eslint",
    "extends": ["eslint:recommended", "plugin:react/recommended", "airbnb", "prettier"],
    "parserOptions": {
        "sourceType": "module",
        "ecmaVersion": 2015
    },
    "env": {
        "browser": true,
        "node": true,
        "jest": true,
        "commonjs": true
    },
    "rules": {
        "react/jsx-uses-react": "error",
        "react/jsx-uses-vars": "error",
        "react/jsx-filename-extension": [1, { "extensions": [".js", ".jsx"] }],
        "linebreak-style": "off",
        "no-undef": "off",
        "no-debugger": "off",
        "no-alert": "off",
        "indent": ["error", 4],
        "quotes": "off",
        "no-console": "off"
    }
}

React 版本是 ^17.0.1

babel-eslint 是 ^10.1.0

eslint 是 ^7.14.0

eslint-plugin-react 是 ^7.21.5

Answer 1

看起来它与文件中的实际 JSX 有关

您的配置在实际包含有效 JSX 的文件上运行良好：

// App.jsx
import React from 'react'; // 
const App = () => {
    return <div />; // JSX
}

export default App

但如果在文件中未找到 JSX，则会抛出您描述的错误：

// App.jsx
import React from 'react'; // 'React' is defined but never used 
const App = () => {
    return 1; // no JSX
}

export default App

如何使用 React 设置 Eslint

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