base on connect-history-api-fallback
npm install koa2-history-api-fallbackkoa2-history-api-fallback
=========================
base 'connect-history-api-fallback' for SPA
yield*, so 'koa-connect-history-api-fallback' can't adapter for Koa v2.x . Adapter for 'connect-history-api-fallback' for use with Koa ^2.0.0.
1. use 'koa2-history-api-fallback'
2. use 'koa-convert' convert old middleware ...
```
$ npm install --save 'koa2-history-api-fallback'
const Koa = require('koa')const historyFallback = require('koa2-history-api-fallback')
app.use(historyFallback())
app.use('other middleware')
``