.babelrc 是目前 babel-polyfill 的最佳实践
{
"presets": [
[
"@babel/preset-env",
{
"corejs": "3",
"modules": false,
"useBuiltIns": "usage"
}
]
],
"plugins": [
[
"@babel/plugin-transform-runtime",
{
"corejs": false,
"helpers": true,
"regenerator": false,
"useESModules": true
}
]
]
}
