Themes in Syncfusion React Components

Syncfusion React components provide comprehensive theming support with modern, customizable themes. This skill guides you through applying themes, customizing appearance, implementing dark mode, using CSS variables, managing icons, and creating custom themes for consistent, professional React applications.

Documentation and Navigation Guide
Quick Start
Common Patterns

Documentation and Navigation Guide

Built-in Themes

📄 Read: references/built-in-themes.md

Available 10+ themes
Applying themes via npm packages, CDN, or individual component styles
Optimized (lite) CSS files for reduced bundle size
Theme comparison and selection guide
Legacy theme support

Dark Mode Implementation

📄 Read: references/dark-mode.md

Global dark mode with e-dark-mode class
Per-component dark mode
Runtime theme switching with checkboxes or toggle buttons

CSS Variables Customization

📄 Read: references/css-variables.md

CSS variable structure for each theme (Material 3, Fluent 2, Bootstrap 5.3, Tailwind 3.4)
Customizing primary, success, warning, danger, info colors
Runtime color modification with JavaScript
Theme-specific variable formats (RGB vs hex values)
Material 3 color system (primary, secondary, tertiary, surface)

Icon Library

📄 Read: references/icons.md

Setting up the icon library (npm or CDN)
Using icons with e-icons class
Icon sizing (small, medium, large)
Customizing icon color and appearance
Available icon sets per theme

Size Modes

📄 Read: references/advanced-theming.md

Normal vs touch (bigger) size modes
Enabling size modes globally or per-component
Runtime size mode switching

Advanced Features

📄 Read: references/advanced-theming.md

Styled-components integration
Font customization across all components
Theme Studio for custom theme creation

Quick Start

Install and Apply a Theme

Step 1: Install Syncfusion React Package

npm install @syncfusion/ej2-react-buttons --save

Step 2: Import Theme CSS

/* src/App.css */
@import "../node_modules/@syncfusion/ej2-base/styles/tailwind3.css";
@import "../node_modules/@syncfusion/ej2-buttons/styles/tailwind3.css";

Or use CDN (ensure version matches your npm packages):

<!-- index.html -->
<link href="https://cdn.syncfusion.com/ej2/32.1.19/tailwind3.css" rel="stylesheet"/>

Common Patterns

Pattern 1: Apply Dark Mode Globally

import React, { useState } from 'react';
import { CheckBoxComponent } from '@syncfusion/ej2-react-buttons';
import { ButtonComponent } from '@syncfusion/ej2-react-buttons';

function App() {
  const [isDarkMode, setIsDarkMode] = useState(false);

  const handleDarkModeToggle = (event) => {
    const checked = event.checked ?? false;
    setIsDarkMode(checked);
    
    if (checked) {
      document.body.classList.add('e-dark-mode');
    } else {
      document.body.classList.remove('e-dark-mode');
    }
  };

  return (
    <div>
      <CheckBoxComponent 
        label="Enable Dark Mode" 
        checked={isDarkMode} 
        change={handleDarkModeToggle}
      />
      <ButtonComponent cssClass="e-primary">Sample Button</ButtonComponent>
    </div>
  );
}

export default App;

Pattern 2: Customize Primary Color with CSS Variables

For Fluent 2 Theme:

/* src/App.css */
:root {
  --color-sf-primary: #ff6b35;  /* Custom orange */
}

For Material 3 Theme (uses RGB values):

/* src/App.css */
:root {
  --color-sf-primary: 255, 107, 53;  /* RGB: Custom orange */
}

Pattern 3: Enable Touch Mode Globally

<!-- index.html -->
<body class="e-bigger">
  <div id="root"></div>
</body>

Or per-component:

<ButtonComponent cssClass="e-bigger">Touch-Friendly Button</ButtonComponent>

Pattern 4: Use Optimized CSS for Faster Loading

/* src/App.css - Lite version without bigger mode styles */
@import "@syncfusion/ej2/tailwind3-lite.css";

Pattern 5: Use Icons from Syncfusion Library

Install icons package:

npm install @syncfusion/ej2-icons

Import icon styles:

/* src/App.css */
@import "../node_modules/@syncfusion/ej2-icons/styles/tailwind3.css";

Use icons in components:

<span className="e-icons e-cut"></span>
<span className="e-icons e-medium e-copy"></span>
<span className="e-icons e-large e-paste"></span>

syncfusion-react-themes