javascript - "loose": true is not fixing Support for the experimental syntax 'classProperties' isn't currently enabled

Question

Support for the experimental syntax 'classProperties' isn't currently enabled

我尝试了解决方案，重新构建后仍然出现错误。

Support for the experimental syntax 'classProperties' isn't currently enabled

package.json

{
  "name": "blahmodule",
  "version": "1.0.0",
  "description": "a fetch module for our project",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "build": "./node_modules/.bin/babel src --out-file index.js"
  },
  "peerDependencies": {
    "react": "^16.6.6",
    "react-dom": "^16.6.3",
    "axios": "^0.19.0"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "@babel/cli": "^7.4.4",
    "@babel/core": "^7.4.5",
    "@babel/preset-env": "^7.4.5",
    "@babel/preset-react": "^7.0.0",
    "react": "^16.8.6",
    "react-dom": "^16.8.6"
  },
  "devDependencies": {
    "@babel/plugin-proposal-class-properties": "^7.4.4",
    "axios": "^0.19.0"
  }
}

.babelrc

{
    "presets": [
      "@babel/preset-env",
      "@babel/preset-react"
    ],
    "plugins": [
        [
          "@babel/plugin-proposal-class-properties",
          {
            "loose": true
          }
        ]
      ]
  }

Answer 1

我正在使用 plugin-proposal-class-properties 并且它可以工作，这是我的 JSON 配置文件 .babelrc

{
  "presets": ["@babel/preset-env"],
  "plugins": [
    [
      "@babel/plugin-proposal-class-properties",
      {"loose": true}
    ]
  ]
}