import express from 'express';
import proxy from 'http-proxy-middleware';
import webpack from 'webpack';
import WebpackDevServer from 'webpack-dev-server';
import { configureWebpack } from './webpack.config';
import { getEntry } from './helpers';
import {
  getPageId,
  staticConfig,
  sleep,
} from '../helpers';

const cwd = process.cwd();

const ufs = require('unionfs').ufs;
const memfs = new MemoryFileSystem();
ufs.use(fs).use(memfs);

export default async (app: express.Application): Promise =&gt; {
  fse.removeSync(path.join(cwd, staticConfig.distDir));

  let compiled = false;
  const [entry, entryPages] = await getEntry(memfs);
  const webpackConfig: webpack.Configuration = configureWebpack(entry);
  const compiler: webpack.Compiler = webpack(webpackConfig);
  compiler.hooks.afterCompile.tap('finish', () =&gt; { compiled = true });
  compiler.inputFileSystem = ufs;

  const devServerPort = 8888;
  const devServer = new WebpackDevServer(compiler, {
    hot: true,
    noInfo: true,

Most popular functions for memory-fs

To help you get started, we’ve selected a few memory-fs examples, based on popular ways it is used in public projects.

memory-fs

memory-fs.prototype