React components in Electron application won’t show

Good day everyone. I am running an Electron/React application or however you put it. Anyways, I have created three React components and put them into my app.js

import React from "react";
import ReactDOM from "react-dom";
import Search from "./components/search.component";
import Details from "./components/details.component";
import Player from "./components/player.component";

class App extends React.Component {
    render() {
        return (
            <div>
                <Search />
                <Details title={'Track title'} />
                <Player />
            </div>
        );
    }
}

ReactDOM.render(<App />, document.getElementById('content'))

There’s no error that comes from running the application, but none of my components are showing. When I run this as just a regular React application, it does work. Any help would be greatly appreciated!