.babelrc
{
"presets": [
"@babel/preset-react",
[
"@babel/preset-env",
{
"modules": false,
"targets": {
"browsers": "> 1%"
},
"corejs": "2.0",
"forceAllTransforms": true,
"useBuiltIns": "usage"
}
]
],
"env": {
"test": {
"plugins": ["@babel/plugin-transform-modules-commonjs"]
}
},
"plugins": [
"@babel/plugin-transform-runtime",
[
"@babel/plugin-proposal-class-properties",
{
"spec": true
}
],
"@babel/plugin-transform-optional-chaining",
"@babel/plugin-transform-nullish-coalescing-operator"
]
}