Babel preset for all envs.
$ npm install --save-dev babel-preset-env
.babelrc
{
"presets": ["env"]
}
$ babel script.js --presets env
require("babel-core").transform("code", {
presets: ["env"]
});
loose
- Enable "loose" transformations for any plugins in this preset that allow them (Disabled by default).
{
presets: [
["env", {
chrome: 49
}]
]
}