npm install --save-dev babel-plugin-transform-decorators-legacy 然后在node_modules/babel-preset-react-app/create.js plugins中添加 require.resolve('babel-plugin-transform-decorators-legacy')
babel 為7.X版本時
npm install --save-dev @babel/plugin-proposal-decorators
然后在node_modules/_babel-preset-react-app@5.0.4@babel-preset-react-app/create.js plugins 中添加
[ require('@babel/plugin-proposal-decorators'), { "legacy": true, } ],