core-js-builder

For some cases could be useful to exclude some core-js features or generate a polyfill for target engines. This API helps conditionally include or exclude certain parts of core-js, use browserslist queries from core-js-compat package.

require('core-js-builder')({
  modules: ['es', 'esnext.reflect', 'web'],         // modules / namespaces, by default - all `core-js` modules
  exclude: ['es.math', 'es.number.constructor'],    // a blacklist of modules / namespaces, by default - empty list
  targets: '> 0.5%',                                // optional browserslist query
  filename: './my-core-js-bundle.js',               // optional target filename, if it's missed a file will not be created
}).then(code => {                                   // code of result polyfill
  // ...
}).catch(error => {
  // ...
});