open option doesn't work in API mode

[guoyunhe]

• Operating System: Linux
• Node Version: 10.15.2
• NPM Version: 6.9.0
• webpack Version: 4.29.6
• webpack-dev-server Version: 3.3.0

• This is a bug
• This is a modification request

Code

// webpack.config.js

'use strict';

// our setup function adds behind-the-scenes bits to the config that all of our
// examples need
const { setup } = require('../../util');

module.exports = setup({
  context: __dirname,
  entry: ['./app.js', '../../../client/index.js?http://localhost:8080/'],
  output: {
    filename: 'bundle.js',
  },
});

// scripts/start.js
'use strict';

const Webpack = require('webpack');
const WebpackDevServer = require('../../../lib/Server');
const webpackConfig = require('./webpack.config');

const compiler = Webpack(webpackConfig);
const devServerOptions = Object.assign({}, webpackConfig.devServer, {
  open: true,
  stats: {
    colors: true,
  },
});
const server = new WebpackDevServer(compiler, devServerOptions);

server.listen(8080, '127.0.0.1', () => {
  console.log('Starting server on http://localhost:8080');
});

Expected Behavior

Running the script should open browser.

Actual Behavior

Browser is not opened.

For Bugs; How can we reproduce the behavior?

git clone git@github.com:guoyunhe/webpack-dev-server.git
cd webpack-dev-server
npm install
cd examples/api/simple
node server.js

For Features; What is the motivation and/or use-case for the feature?

[alexander-akait]

Thanks for issue, duplicate #1540, Feel free to send a PR

[alexander-akait]

Thanks for issue, duplicate #1510, Feel free to send a PR