【发布时间】：2020-10-08 14:32:22
【问题描述】：
我想为我的组件使用装饰器。但是我遇到以下错误消息：
Parsing error: Using the export keyword between a decorator and a class is not allowed. Please use `export @dec class` instead.
我在以下post 中找到了解决方案，建议使用.eslintrc 文件中的legacyDecorators 选项。
{
"parserOptions": {
"ecmaFeatures": {
"legacyDecorators": true
}
}
}
但是，我不知道必须在哪里插入该代码才能激活旧选项。
更新
我同时弹出了我的 create-react-app，我现在可以直接在 package.jason 中配置 babel 和 eslint (eslintConfig)，如下所示。
{
"name": "Test",
"version": "0.1.0",
"private": true,
"dependencies": {
"@babel/core": "7.8.4",
"@babel/runtime": "7.0.0-beta.55",
"@fortawesome/fontawesome-free": "^5.13.0",
"@material-ui/core": "^1.5.1",
"@material-ui/icons": "^1.1.0",
"@svgr/webpack": "4.3.3",
"@testing-library/jest-dom": "^4.2.4",
"@testing-library/react": "^9.4.0",
"@testing-library/user-event": "^7.2.1",
"@types/jest": "^24.9.1",
"@types/node": "^12.12.28",
"@types/react": "^16.9.21",
"@types/react-dom": "^16.9.5",
"@types/react-router-dom": "^5.1.3",
"@typescript-eslint/eslint-plugin": "^2.10.0",
"@typescript-eslint/parser": "^2.10.0",
"axios": "^0.19.2",
"babel-eslint": "10.0.3",
"babel-jest": "^24.9.0",
"babel-loader": "8.0.6",
"babel-plugin-named-asset-import": "^0.3.6",
"babel-preset-react-app": "^9.1.1",
"bootstrap": "^4.4.1",
"camelcase": "^5.3.1",
"case-sensitive-paths-webpack-plugin": "2.3.0",
"css-loader": "3.4.2",
"d3-ease": "^1.0.6",
"dotenv": "8.2.0",
"dotenv-expand": "5.1.0",
"eslint": "^6.6.0",
"eslint-config-react-app": "^5.2.0",
"eslint-loader": "3.0.3",
"eslint-plugin-flowtype": "4.6.0",
"eslint-plugin-import": "2.20.0",
"eslint-plugin-jsx-a11y": "6.2.3",
"eslint-plugin-react": "7.18.0",
"eslint-plugin-react-hooks": "^1.6.1",
"file-loader": "4.3.0",
"fs-extra": "^8.1.0",
"html-react-parser": "^0.10.3",
"html-to-react": "^1.4.2",
"html-webpack-plugin": "4.0.0-beta.11",
"identity-obj-proxy": "3.0.0",
"install": "^0.13.0",
"jest": "24.9.0",
"jest-environment-jsdom-fourteen": "1.0.1",
"jest-resolve": "24.9.0",
"jest-watch-typeahead": "0.4.2",
"jquery": "^3.4.1",
"material-kit-react": "^1.8.0",
"mdbreact": "^4.25.5",
"mini-css-extract-plugin": "0.9.0",
"npm": "^6.14.2",
"optimize-css-assets-webpack-plugin": "5.0.3",
"pnp-webpack-plugin": "1.6.0",
"postcss-flexbugs-fixes": "4.1.0",
"postcss-loader": "3.0.0",
"postcss-normalize": "8.0.1",
"postcss-preset-env": "6.7.0",
"postcss-safe-parser": "4.0.1",
"prop-types": "^15.7.2",
"pure-react-carousel": "^1.26.1",
"react": "^16.12.0",
"react-alert": "^6.0.1",
"react-alert-template-basic": "^1.0.0",
"react-app-polyfill": "^1.0.6",
"react-audio-player": "^0.11.1",
"react-bootstrap": "^1.0.0-beta.17",
"react-bootstrap-carousel": "^4.0.3",
"react-dev-utils": "^10.2.0",
"react-dom": "^16.12.0",
"react-geocode": "^0.2.1",
"react-google-autocomplete": "^1.1.2",
"react-google-maps": "^9.4.5",
"react-h5-audio-player": "^2.4.2",
"react-image-appear": "^1.2.23",
"react-loading-image": "^0.5.0",
"react-redux": "^7.2.0",
"react-reveal": "^1.2.2",
"react-router": "^5.1.2",
"react-router-dom": "^5.1.2",
"react-scroll": "^1.7.9",
"react-select": "^3.1.0",
"react-slick": "^0.23.1",
"react-transition-group": "^4.3.0",
"redux": "^4.0.5",
"redux-devtools-extension": "^2.13.8",
"redux-thunk": "^2.3.0",
"resolve": "1.15.0",
"resolve-url-loader": "3.1.1",
"sass-loader": "8.0.2",
"semver": "6.3.0",
"slick-carousel": "^1.8.1",
"style-loader": "0.23.1",
"styled-components": "^5.0.1",
"terser-webpack-plugin": "2.3.4",
"ts-pnp": "1.1.5",
"typescript": "^3.7.5",
"url-loader": "2.3.0",
"webpack": "4.41.5",
"webpack-dev-server": "3.10.2",
"webpack-manifest-plugin": "2.2.0",
"workbox-webpack-plugin": "4.3.1"
},
"scripts": {
"start": "node scripts/start.js",
"build": "node scripts/build.js",
"test": "node scripts/test.js"
},
"eslintConfig": {
"extends": "react-app",
"parser": "babel-eslint",
"parserOptions": {
"ecmaFeatures": {
"legacyDecorators": true
}
}
},
"browserslist": {
"production": [
">0.2%",
"not dead",
"not op_mini all"
],
"development": [
"last 1 chrome version",
"last 1 firefox version",
"last 1 safari version"
]
},
"jest": {
"roots": [
"<rootDir>/src"
],
"collectCoverageFrom": [
"src/**/*.{js,jsx,ts,tsx}",
"!src/**/*.d.ts"
],
"setupFiles": [
"react-app-polyfill/jsdom"
],
"setupFilesAfterEnv": [],
"testMatch": [
"<rootDir>/src/**/__tests__/**/*.{js,jsx,ts,tsx}",
"<rootDir>/src/**/*.{spec,test}.{js,jsx,ts,tsx}"
],
"testEnvironment": "jest-environment-jsdom-fourteen",
"transform": {
"^.+\\.(js|jsx|ts|tsx)$": "<rootDir>/node_modules/babel-jest",
"^.+\\.css$": "<rootDir>/config/jest/cssTransform.js",
"^(?!.*\\.(js|jsx|ts|tsx|css|json)$)": "<rootDir>/config/jest/fileTransform.js"
},
"transformIgnorePatterns": [
"[/\\\\]node_modules[/\\\\].+\\.(js|jsx|ts|tsx)$",
"^.+\\.module\\.(css|sass|scss)$"
],
"modulePaths": [],
"moduleNameMapper": {
"^react-native$": "react-native-web",
"^.+\\.module\\.(css|sass|scss)$": "identity-obj-proxy"
},
"moduleFileExtensions": [
"web.js",
"js",
"web.ts",
"ts",
"web.tsx",
"tsx",
"json",
"web.jsx",
"jsx",
"node"
],
"watchPlugins": [
"jest-watch-typeahead/filename",
"jest-watch-typeahead/testname"
]
},
"babel": {
"presets": [
"react-app"
],
"plugins": [
[
"@babel/plugin-proposal-decorators",
{
"legacy": true
}
]
]
},
"devDependencies": {
"@babel/plugin-proposal-decorators": "^7.10.1"
}
}
我在 babel 下添加了建议的行。但是同样的问题仍然出现。
【问题讨论】：
-
请发布您的 .babelrc（或等效）配置