展开运算符和EsLint

Question

展开运算符和EsLint

42

我想复制一个对象并更改其中的一个字段。类似这样：

const initialState = {
  showTagPanel: false,
};

export default function reducerFoo(state = initialState, action) {

  switch(action.type) {
    case types.SHOW_TAG_PANEL:
      console.log(state);

      return {
        ...state,
        showTagPanel: true
      };

    default:
      return state;
  }
}

这段代码运行良好，但是 eslint 显示错误

Unexpected token (14:8)
  12 |
  13 |       return {
> 14 |         ...state,
     |         ^
  15 |         showTagPanel: true
  16 |       };
  17 |

这是我的 .eslintrc 文件：

{
  "extends": [
    "eslint:recommended",
    "plugin:import/errors",
    "plugin:import/warnings"
  ],
  "plugins": [
    "react"
  ],
  "parserOptions": {
    "ecmaVersion": 6,
    "sourceType": "module",
    "ecmaFeatures": {
      "jsx": true
    }
  },
  "env": {
    "es6": true,
    "browser": true,
    "node": true,
    "jquery": true,
    "mocha": true
  },
  "rules": {
    "quotes": 0,
    "no-console": 1,
    "no-debugger": 1,
    "no-var": 1,
    "semi": [1, "always"],
    "no-trailing-spaces": 0,
    "eol-last": 0,
    "no-unused-vars": 0,
    "no-underscore-dangle": 0,
    "no-alert": 0,
    "no-lone-blocks": 0,
    "jsx-quotes": 1,
    "react/display-name": [ 1, {"ignoreTranspilerName": false }],
    "react/forbid-prop-types": [1, {"forbid": ["any"]}],
    "react/jsx-boolean-value": 1,
    "react/jsx-closing-bracket-location": 0,
    "react/jsx-curly-spacing": 1,
    "react/jsx-indent-props": 0,
    "react/jsx-key": 1,
    "react/jsx-max-props-per-line": 0,
    "react/jsx-no-bind": 1,
    "react/jsx-no-duplicate-props": 1,
    "react/jsx-no-literals": 0,
    "react/jsx-no-undef": 1,
    "react/jsx-pascal-case": 1,
    "react/jsx-sort-prop-types": 0,
    "react/jsx-sort-props": 0,
    "react/jsx-uses-react": 1,
    "react/jsx-uses-vars": 1,
    "react/no-danger": 1,
    "react/no-did-mount-set-state": 1,
    "react/no-did-update-set-state": 1,
    "react/no-direct-mutation-state": 1,
    "react/no-multi-comp": 1,
    "react/no-set-state": 0,
    "react/no-unknown-property": 1,
    "react/prefer-es6-class": 1,
    "react/prop-types": 1,
    "react/react-in-jsx-scope": 1,
    "react/require-extension": 1,
    "react/self-closing-comp": 1,
    "react/sort-comp": 1,
    "react/wrap-multilines": 1
  }
}

我该怎么修复它？

- ceth

1

尝试将"experimentalObjectRestSpread": true添加到"ecmaFeatures"中。 - ideaboxer

2个回答

1

顺便提一句，如果 @Alexander 在 2017 年 7 月 15 日回答并不能解决你的问题，请将你的 ecmaVersion 改为 2018，像这样：

ESLint ^5 or newer version
{
  "env": {...},
  "extends": [...],
  "parserOptions": {
    "ecmaVersion": 2018, // use this.
    "ecmaFeatures": {
      "jsx": true // just use this on ecmaFeatures, no need "experimentalObjectRestSpread" anymore.
    }
  }
}

使用 "experimentalObjectRestSpread": true 来代替，如下所示：

This is only for ESLint under v5
{
  "env": {...},
  "extends": [...],
  "parserOptions": {
    "ecmaVersion": 6,
    "ecmaFeatures": {
      "jsx": true,
      "experimentalObjectRestSpread": true // instead this
    }
  }
}

如果您想要完整的解释，请阅读这里 -> experimentalObjectRestSpread已被弃用。

- Adit

2

不幸的是，这对我没有起作用。我仍然得到 `...calculateStatsPerFile(messages) ^^^SyntaxError: Unexpected token ... at createScript (vm.js:74:10)` - Ryan

@Ryan，你的项目上另一个“规则”怎么样了？它是否起作用了？ - Adit

我不确定你在问什么。是的，我的.eslintrc.js文件中也有一块rules代码块。 - Ryan

网页内容由stack overflow 提供, 点击上面的

可以查看英文原文，
原文链接

- Alexander · Accepted Answer

eslint 5.0.0更新说明

来源：https://eslint.org/docs/5.0.0/user-guide/migrating-to-5.0.0

在您的.eslintrc文件中，添加parserOptions的ecmaVersion:2018属性。

{
  "extends": [
    "eslint:recommended"
  ],
  "parserOptions": {
    "ecmaVersion": 2018,
    "sourceType": "module",
    "ecmaFeatures": {
      "jsx": true,
    }
  }
}

最初的回答

在您的.eslintrc文件中，将"experimentalObjectRestSpread": true添加到ecmaFeatures中。

示例

{
  "extends": [
    "eslint:recommended"
  ],
  "parserOptions": {
    "ecmaVersion": 6,
    "sourceType": "module",
    "ecmaFeatures": {
      "jsx": true,
      "experimentalObjectRestSpread": true
    }
  }
}