babel-preset-r29
A Babel preset for Refinery29
Install
npm install --save-dev babel-preset-r29
Usage
.babelrc
(Recommended)
Via .babelrc
or, with some of our supported options:
Via CLI
$ babel script.js --presets r29
Via Node API
;
Supported options
node
boolean
, defaults to false
.
Targets Node v6 instead of browsers. Useful for avoiding the inclusion of unnecessary things like the regenerator runtime in our server builds.
loose
boolean
, defaults to false
.
Turns on the ES2015 plugin's loose mode. http://2ality.com/2015/12/babel6-loose-mode.html
In practice we have found that this can reduce bundle size by ~5%.
modules
"amd" | "umd" | "systemjs" | "commonjs" | false
, defaults to "commonjs".
Enable transformation of ES6 module syntax to another module type.
Setting this to false will not transform modules. Use this for Webpack >=2,
since Webpack >=2's tree-shaking works best if you don't transform import
/export
statements.
Example of a Webpack config where this is the case:
test: /\.js$/ use: loader: 'babel-loader' options: presets: 'r29' modules: false plugins: exclude: /node_modules/