误报 eslint(no-unused-vars)

Posted 2023-02-21

【中文标题】误报 eslint(no-unused-vars)

【英文标题】：False Positive eslint(no-unused-vars)

【发布时间】：2019-07-06 16:20:15

【问题描述】：

在这里你可以看到我有一个非常简单的 react 组件，但是 eslint 规则给了我一个误报。

配置详情

package.json

"devDependencies": 
    "eslint": "^5.13.0",
    "eslint-plugin-react": "^7.12.4",
    "eslint-plugin-react-hooks": "^1.0.1",

.eslintrc.js

module.exports = 
    "env": 
        "browser": true,
        "es6": true
    ,
    "extends": "eslint:recommended",
    "parserOptions": 
        "ecmaFeatures": 
            "jsx": true
        ,
        "ecmaVersion": 2018,
        "sourceType": "module"
    ,
    "plugins": [
        "react",
        "react-hooks"
    ],
    "rules": 
        "indent": [
            "error",
            2
        ],
        "linebreak-style": [
            "error",
            "unix"
        ],
        "quotes": [
            "error",
            "single"
        ],
        "semi": [
            "error",
            "never"
        ],
        "react-hooks/rules-of-hooks": "error"
    ,
    "settings": 
        "react": 
            "createClass": "createReactClass", // Regex for Component Factory to use, default to "createReactClass"
            "pragma": "React",  // Pragma to use, default to "React"
            "version": "detect", // React version. "detect" automatically picks the version you have installed. You can also use `16.0`, `16.3`, etc, if you want to override the detected value.
        ,
        "linkComponents": [
            // Components used as alternatives to <a> for linking, eg. <Link to= url  />
            "Hyperlink",
             "name": "Link", "linkAttribute": "to" 
        ]
    
;

【问题讨论】：

这能回答你的问题吗？ ESLint with React gives `no-unused-vars` errors

【参考方案1】：

默认情况下，ESLint 不知道 JSX 中变量使用的 React 语义。为了解决这个问题，我可以启用 react/jsx-uses-vars 规则或从 plugin:react/recommended 配置扩展。我选择了后者。

"extends": ["eslint:recommended", "plugin:react/recommended"]