What are some effective methods for changing themes within a web app using React and Redux?

I am looking to add a feature in my React and Redux web app that allows users to switch between two different themes.

Currently, I have two separate CSS files for each theme, which I import at the top of my App.js file to apply the styles.

import '../styles/theme1.css';

const App = (props) => {
    return (
      <div>
        <Header />
        <Container/>
      </div>
    );
};

const mapStateToProps = (state) => ({
    theme: state.settings.theme  // can be 'theme1' or 'theme2'
});

export default withRouter(connect(mapStateToProps)(App));

Instead of importing the CSS file statically, I want to dynamically import the styling based on the current theme stored in the application's state ('theme1' or 'theme2').
I have come across some solutions and packages, but I am curious to find out if there is a recommended and cleaner approach to achieve this efficiently.

The project is built using create-react-app.

Thank you.

Answer №1

If your taskrunner setup allows for it, one solution could be to integrate React-Helmet. This will enable you to alter the CSS reference in the <head> section based on the chosen theme.

import React from "react";
import {Helmet} from "react-helmet";

function ThemeSwitcher (props) {
  return (
    <Helmet>
      <link rel="stylesheet" href={props.stylesheet} />
    </Helmet>
  );
};

Answer №2

Consider exploring the benefits of using scss/sass - it has the potential to streamline your workflow by enabling you to nest classes and elements for easier styling.

For instance, let's say you need to toggle between two themes, themeA and themeB:

<div className={this.state.theme}>
   <h2>Some text</h2>
</div>

Your corresponding .scss file would then resemble the following:

.themeA{
   background-color: black;

     h2 {
      color: white;
     }
}

.themeB{
  background-color: white;

    h2{
     color: black;
    }
}

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