hot reload newly added entry point

[hellofantastic]

Let me say pretty marvellous repo, I've learned a bit about webpack.

I decided to add another entry point in the webpack.config

  indexScript: path.join(__dirname, 'src', 'index.jsx'),

inside this file is this:
it makes use of InboxSDK.js
it adds functionality to various parts of Gmail web UI and accepts React nicely for UI building
I added it to webpack config and it gets copied over where it needs to be

import React from 'react';
import ReactDOM from 'react-dom';

const TestFeature = () => <div>boo hoo</div>; //editing these components does not trigger a reload
const Sidebar = () => <div>Boo hoo hoo</div>;

InboxSDK.load(2, 'app-id').then((sdk) => {

    //Add Compose new window bottom toolbar
    sdk.Compose.registerComposeViewHandler((composeView) => {
        composeView.addButton({
            title: "Test Feature",
            iconUrl: chrome.runtime.getURL('images/template-list-256x256.svg'),
            hasDropdown: true,
            onClick: (event) => {
                ReactDOM.render(<TestFeature />, event.dropdown.el);
            }
        });
    });

    //Sidebar 
    let el = document.createElement('div')
    ReactDOM.render(<Sidebar />, el)

    const panelView = sdk.Global.addSidebarContentPanel({
        title: 'Sidebar test',
        iconUrl: 'sidebarlogo.png',
        el: el
    })

    //Auto Open sidebar
    //Mainly handle for development
    panelView.then(function (panel) {
        panel.open()
    });

});

Everything loads up and works except no magic reload for indexScript
When I save indexScript the webserver recompiles build updates but I need to refresh extension page setting and then reload browser

Any insight much appreciated

[hellofantastic]

Okay so reading this (why?) from readme.
Sorry for being dense but does this mean you can't get HMR with content scripts?

[hellofantastic]

Not exactly but I kept reading and this gets content scripts reloaded,
samuelsimoes/chrome-extension-webpack-boilerplate#4 (comment)
it forces the browser to reload so not HMR just R