the babel docs say the modules default option is auto, what does the auto means? does it transform the "import" to "require" or not? what's the difference between "modules: false" and "modules: auto"? it seems they are the same result; I'm learning tree shaking, when I didn't set any options to my @babel/preset-env, tree shaking success, when I set "modules: false", the tree shaking also succeed;
"presets": [
[
"@babel/preset-react"
],
[
"@babel/preset-env",{"modules": "false"}
]
],
auto means default value and default value of modules is false. See - https://github.com/babel/babel/pull/8485/files#r236086742.
`Invalid Option: The 'modules' option must be one of \n` +
` - 'false' to indicate no module processing\n` +
` - a specific module type: 'commonjs', 'amd', 'umd', 'systemjs'` +
` - 'auto' (default) which will automatically select 'false' if the current\n` +
` process is known to support ES module syntax, or "commonjs" otherwise\n`,