Error: The ‘decorators’ plugin requires a ‘decoratorsBeforeExport’ option, whose value must be a boolean. If you are migrating from Babylon/Babel 6 or want to use the old decorators proposal, you should use the ‘decorators-legacy’ plugin instead of ‘decorators’.
解决办法：
cnpm install babel-plugin-transform-decorators-legacy --save-dev
cnpm install @babel/plugin-proposal-decorators --save-dev
然后npm run eject 弹出个性化配置
执行npm run eject 出现问题请执行一下步骤：(mac)
1.git add .
2.git commit -am "Save before ejecting"
修改babel部分，添加代码
"plugins": [
["@babel/plugin-proposal-decorators", { "legacy": true }],
["@babel/plugin-proposal-class-properties", { "loose" : true }]
]
完成解决！
