react.js 'x' 被分配了一个值但从未使用过 no-unused-vars

Question

我已经设置了 eslint 和 eslint-plugin-react。

当我运行 ESLint 时，linter returns no-unused-vars .

我假设它没有识别出我使用的是 JSX 或 React 语法。有什么想法吗？

第 5:11 行：'x' 被分配了一个值但从未使用过 no-unused-vars

示例：

请帮帮我

在文件组件内

import React,{ Component } from 'react';
class Item extends Component{
   render () {
       const x = 1;
       return (
         <div>test</div>
       );
    }
};

export default Item;

在文件中 .eslintrc.json

{
"env": {
    "browser": true,
    "es6": true
},
"extends": [
    "eslint:recommended",
    "plugin:react/recommended",
    "react-app","prettier"
],
"settings": {
  "react": {
    "createClass": "createReactClass"
    "pragma": "React",
    "version": "detect",
    "flowVersion": "0.53"
  },
  "propWrapperFunctions": [
      "forbidExtraProps",
      {"property": "freeze", "object": "Object"},
      {"property": "myFavoriteWrapper"}
  ],
  "linkComponents": [
    "Hyperlink",
    {"name": "Link", "linkAttribute": "to"}
  ]
},
"parserOptions": {
    "ecmaVersion": 2018,
    "ecmaFeatures": {
      "jsx": true
    }
},
"plugins": [
    "react","prettier"
],
"rules": {
  "react/jsx-uses-react": "error",
  "react/jsx-uses-vars": "error",
  "no-unused-vars": ["error", { "vars": "all", "args": "after-used", "ignoreRestSiblings": false }],
}

}

Answer 1

ESLint lint 行为是正确的。你已经声明了 x 但没有在你的 JSX 中使用。如果使用它应该会消失:)

import React,{ Component } from 'react';
class Item extends Component{
   render () {
       const x = 1;
       return (
         <div>test {x}</div>
       );
    }
};

export default Item;

react.js 'x' 被分配了一个值但从未使用过 no-unused-vars

react.js 'x' is assigned a value but never used no-unused-vars

javascript

function

reactjs

eslint

eslintrc