.babelrc
{
"presets": [
[
"@babel/preset-env",
{
"targets": {
"esmodules": true
},
"useBuiltIns": "entry",
"corejs": 3
}
],
"@babel/preset-react",
"@babel/preset-flow"
],
"env": {
"development": {
"plugins": [
"@babel/plugin-proposal-class-properties"
]
},
"production": {
"plugins": [
"@babel/plugin-proposal-class-properties"
]
}
}
}