.babelrc

{
	"presets": [
		[
			"@babel/preset-env",
			{
				"modules": false,
				"useBuiltIns": "entry",
				"corejs": "3.0.0"
			}
		],
		"@babel/preset-react"
	],
	"plugins": [
		"@babel/plugin-proposal-class-properties",
		"@babel/plugin-transform-object-assign",
		"@babel/plugin-syntax-dynamic-import",
		"@babel/plugin-syntax-import-meta",
		"@babel/plugin-proposal-json-strings",
		[
			"@babel/plugin-proposal-decorators",
			{
				"legacy": true
			}
		],
		"@babel/plugin-proposal-function-sent",
		"@babel/plugin-proposal-optional-chaining",
		[
			"@babel/plugin-proposal-pipeline-operator",
			{
				"proposal": "minimal"
			}
		],
		"@babel/plugin-proposal-nullish-coalescing-operator",
		"@babel/plugin-proposal-do-expressions",
		"@babel/plugin-proposal-function-bind"
	],
	"env": {
		"production": {
			"plugins": [
				"@babel/plugin-proposal-class-properties",
				"@babel/plugin-transform-object-assign",
				"@babel/plugin-transform-react-constant-elements"
			]
		},
		"test": {
			"plugins": ["@babel/plugin-transform-modules-commonjs"]
		}
	}
}