React-MobX 错误：'decorators' 插件需要一个 'decoratorsBeforeExport' 选项，其值必须是布尔值

IT技术 reactjs decorator mobx-react
2021-05-19 20:34:31

我收到以下错误：如果您从 Babylon/Babel 6 迁移或想使用旧的装饰器提案，您应该使用“decorators-legacy”插件而不是“decorators”。

包.json

"@babel/plugin-proposal-decorators": {
      "version": "7.1.2",
      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-decorators/-/plugin-proposal-decorators-7.1.2.tgz",
      "integrity": "sha512-YooynBO6PmBgHvAd0fl5e5Tq/a0pEC6RqF62ouafme8FzdIVH41Mz/u1dn8fFVm4jzEJ+g/MsOxouwybJPuP8Q==",
      "requires": {
        "@babel/helper-plugin-utils": "^7.0.0",
        "@babel/helper-replace-supers": "^7.1.0",
        "@babel/helper-split-export-declaration": "^7.0.0",
        "@babel/plugin-syntax-decorators": "^7.1.0"
      }
    },

 "@babel/plugin-syntax-decorators": {
      "version": "7.1.0",
      "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-decorators/-/plugin-syntax-decorators-7.1.0.tgz",
      "integrity": "sha512-uQvRSbgQ0nQg3jsmIixXXDCgSpkBolJ9X7NYThMKCcjvE8dN2uWJUzTUNNAeuKOjARTd+wUQV0ztXpgunZYKzQ==",
      "requires": {
        "@babel/helper-plugin-utils": "^7.0.0"
      }
    },

"babel-plugin-syntax-decorators": {
      "version": "6.13.0",
      "resolved": "http://registry.npmjs.org/babel-plugin-syntax-decorators/-/babel-plugin-syntax-decorators-6.13.0.tgz",
      "integrity": "sha1-MSVjtNvePMgGzuPkFszurd0RrAs=",
      "dev": true
    },
    "babel-plugin-transform-decorators-legacy": {
      "version": "1.3.5",
      "resolved": "https://registry.npmjs.org/babel-plugin-transform-decorators-legacy/-/babel-plugin-transform-decorators-legacy-1.3.5.tgz",
      "integrity": "sha512-jYHwjzRXRelYQ1uGm353zNzf3QmtdCfvJbuYTZ4gKveK7M9H1fs3a5AKdY1JUDl0z97E30ukORW1dzhWvsabtA==",
      "dev": true,
      "requires": {
        "babel-plugin-syntax-decorators": "^6.1.18",
        "babel-runtime": "^6.2.0",
        "babel-template": "^6.3.0"
      }
    },
"requires": {
     "@babel/plugin-proposal-decorators": "7.1.2",
}

配置文件

{
    "compilerOptions": {
        "experimentalDecorators": true,
        "allowJs": true
    }
}
4个回答

错误消息有点令人困惑，但是通过一些深入的搜索，您可以使用以下方法解决它。

我不做任何假设，只是您在本指南中使用了 webpack。

您需要将 babel 提议装饰器添加到您的开发依赖项中（您只在开发期间需要它）（您已经添加了）。

如果使用纱线

yarn add --dev @babel/plugin-proposal-decorators

其他 npm

npm install --save-dev @babel/plugin-proposal-decorators

然后在你的 package.json 文件中，找到 babel config 部分，如果没有则添加一个。配置名称严格为“babel”。

  "babel": {
    "presets": [
      "react-app"
    ],
    "plugins": [
      [
        "@babel/plugin-proposal-decorators",
        {
          "legacy": true
        }
      ]
    ]
  }

如果手动打字，请特别注意缩进。请注意，该对象"@babel/plugin-proposal-decorators"深深嵌套在两个数组中，因此它必须如此才能工作。

并且只是为了健全性检查，您的 devDependencies 至少是 

  "devDependencies": {
    "@babel/plugin-proposal-decorators": "^7.1.2"
  }

现在，您可以使用 yarn 或 npm 构建您的应用程序，并从此过上幸福的生活。

react-native 0.59

babel.config.js:

{ 
  "presets": ["module:metro-react-native-babel-preset"],
  "plugins": [
        ["@babel/plugin-transform-flow-strip-types"],
        ["@babel/plugin-proposal-decorators", { "legacy": true}],
        ["@babel/plugin-proposal-class-properties", { "loose": true}]
    ]
}

npm install @babel/plugin-transform-flow-strip-types @babel/plugin-proposal-decorators @babel/plugin-proposal-class-properties --save

来源：https : //github.com/facebook/react-native/issues/20588#issuecomment-448218111

{
 "presets": ['@babel/preset-env', '@babel/preset-react'],
 "plugins": [
  ["import", { "libraryName": "antd", "libraryDirectory": "es", "style": "less" }],
  [
    "@babel/plugin-proposal-decorators",
    {
      "decoratorsBeforeExport":true
    }
  ]
 ]
}

"babel": {
   "presets": [
     "react-app"
   ],
  "plugins": [
  [
    "@babel/plugin-proposal-decorators",
    {
      "legacy": true
    }
  ],
  [
    "@babel/plugin-proposal-class-properties",
    {
      "loose": true
    }
   ]
  ]
 },
 "devDependencies": {
 "@babel/plugin-proposal-decorators": "^7.3.0"
}
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