text: const merge = require('webpack-merge');
  const prod = require('./webpack.prod.js');
  
  module.exports = merge(prod, {
    mode: "development",
    entry: {
      main: './demo.tsx'
    },
    devtool: 'inline-source-map',
    devServer: {
      port: 3300,
      inline: true,
      open: true,
      openPage: './'
    },
  });
  