load-polyfill
Load which and how many polyfill? Depend on yourself
Notice: this package depend on global Promise, if your dest env does not contain Promise, polyfill it first. For example:
import 'es6-promise/auto'Usage
loadPolyfill accept an array of two dimesions
in each one item[0] should be boolean or function, when function it should return bool in sync code
in each one item[1] could be string or function, when function it should return promise
it return promise, call your main code in 'then' method
Example
import loadPolyfill from 'load-polyfill' // here use dynimic import and webpack code spliting feature.loadPolyfill([ ['isArray' in Array, 'core-js/fn/array/is-array'], // when the second is fn, it must return promise ['isArray' in Array, () => import('lodash/isArray').then(module => Array.isArray = module)], ['from' in Array, 'core-js/fn/array/from'], [() => 'find' in Array.prototype, 'core-js/fn/array/find'], // will call dynimic import('core-js/fn/array/find') [() => 'find' in Array.prototype, () => import('core-js/fn/array/find')], // or run your own logic [() => { // some code to test env does not have Map return 'Map' in global }, () => import('es6-map/polyfill')],]).then(() => { // load your main code here // for example ReactDom.render(<App />, document.querySelector('#main'))}) Pitfalls
polyfills list have to be maintained manually, depend on your dest browser env.
License
MIT