webpack-dev-server: Application with multiple iframes performances problems on hot reload

• Operating System: MacOS BigSur
• Node Version: 14.15
• NPM Version: 6.14.8
• webpack Version: 4.44.2
• webpack-dev-server Version: 3.11.1
• Browser: chrome 88.0.4324.87

• This is a bug
• This is a modification request

Code

// webpack.config.js
{
    output: {
        library: 'viewDesignerApp',
        path: 'dist',
        publicPath: '/my-app/',
        libraryTarget: 'umd'
    },
    entry: {
        'index': 'src/index',
        'index-frame1': 'src/index-frame1',
        'index-frame2': 'src/index-frame2'
    },
    plugins: [
        new HtmlWebpackPlugin({
            filename: 'index.html',
            chunks: ['index']
        }),
        new HtmlWebpackPlugin({
            filename: 'index-frame1.html',
            chunks: ['index-frame1']
        }),
        new HtmlWebpackPlugin({
            filename: 'index-frame2.html',
            chunks: ['index-frame2']
        }),
    ],
    optimization: {
        splitChunks: {
            chunks: 'all'
        }
    },
    devServer: {
        contentBase: ['dist'],
        contentBasePublicPath: '/my-app/',
        compress: true,
        publicPath: '/my-app/',
        port: 3001
    }
}

src/index.js

import {render} from 'react-dom';

const rootNode = document.getElementById('root');
render(
    <div>
        <iframe src="./index-frame1.html" />
        <iframe src="./index-frame2.html" />
    </div>,
    rootNode
);

src/index-frame1.js

import {render} from 'react-dom';

const rootNode = document.getElementById('root');
render(
    <div>SUB FRAME 1</div>,
    rootNode
);

src/index-frame2.js

import {render} from 'react-dom';

const rootNode = document.getElementById('root');
render(
    <div>SUB FRAME 2</div>,
    rootNode
);

Expected Behavior

I’ve an application that contains 2 sub iframes Webpack generates 3 html files for the application In dev mode, in case of code change, only the top level window might listne the events / try to refresh the page or the main window need a way to advert the subframes to avoid listening

Actual Behavior

in dev mode, all the frames + root window are listening the hot reload changes. In case of code change, the frames + root window tries to reload the page in same time Chrome devTools frequently crashes because of to many logs (3x the progress logs) + interrupted sourcemaps decoding

For Bugs; How can we reproduce the behavior?

create an app with an iframe, both pointing to html pages managed by webpack

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