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middleware to provide dynamic polyfills - based on polyfill.io v3
koa-polyfill
Middleware that provides a self-hosted version of polyfill.io
const _ = require('koa-route')
const { getPolyfill } = require('koa-polyfill')
const Koa = require('koa')
const app = new Koa()
app.use(_.get("/polyfill/v3/polyfill.(min.)?js", async (ctx) => {
await getPolyfill(ctx)
})See index.js in this repo for a more complete example.