1.babel版本从6升级到7之后有一些不兼容都更新到版本7，package.json中手动输入版本号
"@babel/cli": "^7.1.0",
"@babel/core": "^7.1.0",
"@babel/preset-env": "^7.1.0",
"@babel/preset-react": "^7.0.0",
"@babel/preset-stage-0": "^7.0.0",
"babel-loader": "^8.0.2",
2.修改webpack.config.js中参数
rules: [
{
test: /\.js[x]$/,
exclude: /node_modules/,
loader: "babel-loader",
}
]
3.babelrc文件下
{
"presets": ["@babel/preset-env", "@babel/preset-react"]
}
然后npm install 启动项目即可