I've been working on adding dark mode to my header component, and I decided to use context API to manage it. However, I'm running into issues with

Question

I've been working on adding dark mode to my header component, and I decided to use context API to manage it. However, I'm running into issues with

In my root component, RootApp.jsx handles the component tree:

import { Suspense } from 'react';
import { HashRouter as Router } from 'react-router-dom';
import { Provider } from 'react-redux';
import store from '@/redux/store';
import PageLoader from '@/components/PageLoader';

import '@/style/app.css';
import '@/style/index.css';
import '@/style/tailwind.css'

import ERP_SODEOs from '@/apps/IdurarOs';
import { ThemeProvider } from '@/context/ThemeContext/ThemeContext'; // Import ThemeProvider

export default function RoutApp() {
  return (
    <Router>
      <Provider store={store}>
        <ThemeProvider>
          <Suspense fallback={<PageLoader />}>
            <ERP_SODEOs />
          </Suspense>
        </ThemeProvider>
      </Provider>
    </Router>
  );
}

Within <ERP_SODEOs>, there are multiple components. The main component handling the child components is ErpApp.jsx:


  return (
    <Layout hasSider>
      <Navigation onPathChange={handlePathChange} />

      {isMobile ? (
        <Layout style={{ marginLeft: 0 }}>
          <HeaderContent />
          <Content
            style={{
              margin: '40px auto 30px',
              overflow: 'initial',
              width: '100%',
              padding: '0 25px',
              maxWidth: 'none',
            }}
          >
            <AppRouter />
          </Content>
        </Layout>
      ) : (
        <Layout style={{ marginLeft: isNavMenuClose ? 100 : 220 }}>
          <HeaderContent currentPath={currentPath} />
          <Content
            style={{
              margin: '30px auto 30px',
              overflow: 'initial',
              width: '100%',
              padding: '0px 10px 0px 0px',
              maxWidth: isNavMenuClose ? 1700 : 1600,
            }}
          >
            <AppRouter />
          </Content>
        </Layout>
      )}
    </Layout>
  );
}

I am attempting to implement dark mode inside my HeaderContent.jsx using a custom CSS file imported globally. However, this implementation is not working as expected.

The dropdown button in HeaderContent allows users to change the theme of the application. When the user selects the "Dark" option, the header color should change. I have also created a context that can be used in other components. Additionally, I have updated the tsconfig file with darkMode: 'class'.

javascript css reactjs tailwind-css antd

Answer 1

Answer №1

To enable dark mode feature using Context API and ensure its functionality throughout your application, including within the HeaderContent component, you must follow a series of steps to properly configure and utilize your ThemeContext. Here is a comprehensive guide to assist you in troubleshooting and implementing this feature:

Step 1: Establish the Theme Context Begin by creating a ThemeContext with a provider and a custom hook for easier usage.

ThemeContext.js

import React, { createContext, useState, useContext, useEffect } from 'react';

const ThemeContext = createContext();

export const ThemeProvider = ({ children }) => {
  const [theme, setTheme] = useState(() => {
    // Retrieve the stored theme or default to 'light'
    const savedTheme = localStorage.getItem('theme');
    return savedTheme ? savedTheme : 'light';
  });

  const toggleTheme = (newTheme) => {
    setTheme(newTheme);
    localStorage.setItem('theme', newTheme);
  };

  useEffect(() => {
    // Apply the theme to the body class
    document.body.className = theme;
  }, [theme]);

  return (
    <ThemeContext.Provider value={{ theme, toggleTheme }}>
      {children}
    </ThemeContext.Provider>
  );
};

export const useTheme = () => useContext(ThemeContext);

Step 2: Wrap Your Application with the Theme Provider Ensure that your ThemeProvider encapsulates your entire application to make the context available to all components.

RootApp.jsx

import { Suspense } from 'react';
import { HashRouter as Router } from 'react-router-dom';
import { Provider } from 'react-redux';
import store from '@/redux/store';
import PageLoader from '@/components/PageLoader';

import '@/style/app.css';
import '@/style/index.css';
import '@/style/tailwind.css';

import ERP_SODEOs from '@/apps/IdurarOs';
import { ThemeProvider } from '@/context/ThemeContext/ThemeContext'; // Import ThemeProvider

export default function RootApp() {
  return (
    <Router>
      <Provider store={store}>
        <ThemeProvider>
          <Suspense fallback={<PageLoader />}>
            <ERP_SODEOs />
          </Suspense>
        </ThemeProvider>
      </Provider>
    </Router>
  );
}

Step 3: Utilize the Theme Context in HeaderContent You can now employ the useTheme hook to access and update the theme within your HeaderContent component.

HeaderContent.jsx

(The code for HeaderContent component remains the same)

Step 4: Implement Dark Mode Styles Lastly, ensure that your CSS includes the appropriate styles for both dark mode and light mode. Use a CSS class on the body element to manage this.

body.light {
  background-color: #ffffff;
  color: #000000;
}

body.dark {
  background-color: #1a1a1a;
  color: #ffffff;
}

In this method, the toggleTheme function adjusts the theme state and updates the local storage accordingly. The useEffect hook applies the selected theme by modifying the body class. The HeaderContent component utilizes the useTheme hook to access the current theme and apply appropriate styling.

By following these steps, you should ensure the successful operation of the dark mode functionality across your application.

Answer 2

To enable dark mode feature using Context API and ensure its functionality throughout your application, including within the HeaderContent component, you must follow a series of steps to properly configure and utilize your ThemeContext. Here is a comprehensive guide to assist you in troubleshooting and implementing this feature:

Step 1: Establish the Theme Context Begin by creating a ThemeContext with a provider and a custom hook for easier usage.

ThemeContext.js

import React, { createContext, useState, useContext, useEffect } from 'react';

const ThemeContext = createContext();

export const ThemeProvider = ({ children }) => {
  const [theme, setTheme] = useState(() => {
    // Retrieve the stored theme or default to 'light'
    const savedTheme = localStorage.getItem('theme');
    return savedTheme ? savedTheme : 'light';
  });

  const toggleTheme = (newTheme) => {
    setTheme(newTheme);
    localStorage.setItem('theme', newTheme);
  };

  useEffect(() => {
    // Apply the theme to the body class
    document.body.className = theme;
  }, [theme]);

  return (
    <ThemeContext.Provider value={{ theme, toggleTheme }}>
      {children}
    </ThemeContext.Provider>
  );
};

export const useTheme = () => useContext(ThemeContext);

Step 2: Wrap Your Application with the Theme Provider Ensure that your ThemeProvider encapsulates your entire application to make the context available to all components.

RootApp.jsx

import { Suspense } from 'react';
import { HashRouter as Router } from 'react-router-dom';
import { Provider } from 'react-redux';
import store from '@/redux/store';
import PageLoader from '@/components/PageLoader';

import '@/style/app.css';
import '@/style/index.css';
import '@/style/tailwind.css';

import ERP_SODEOs from '@/apps/IdurarOs';
import { ThemeProvider } from '@/context/ThemeContext/ThemeContext'; // Import ThemeProvider

export default function RootApp() {
  return (
    <Router>
      <Provider store={store}>
        <ThemeProvider>
          <Suspense fallback={<PageLoader />}>
            <ERP_SODEOs />
          </Suspense>
        </ThemeProvider>
      </Provider>
    </Router>
  );
}

Step 3: Utilize the Theme Context in HeaderContent You can now employ the useTheme hook to access and update the theme within your HeaderContent component.

HeaderContent.jsx

(The code for HeaderContent component remains the same)

Step 4: Implement Dark Mode Styles Lastly, ensure that your CSS includes the appropriate styles for both dark mode and light mode. Use a CSS class on the body element to manage this.

body.light {
  background-color: #ffffff;
  color: #000000;
}

body.dark {
  background-color: #1a1a1a;
  color: #ffffff;
}

In this method, the toggleTheme function adjusts the theme state and updates the local storage accordingly. The useEffect hook applies the selected theme by modifying the body class. The HeaderContent component utilizes the useTheme hook to access the current theme and apply appropriate styling.

By following these steps, you should ensure the successful operation of the dark mode functionality across your application.

I've been working on adding dark mode to my header component, and I decided to use context API to manage it. However, I'm running into issues with

Answer №1

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