Mastering Heroicons with TypeScript

In modern web development, creating visually appealing user interfaces is crucial. Icons play a significant role in enhancing the user experience by providing clear visual cues. Heroicons is a set of free, MIT - licensed high - quality SVG icons that can be easily integrated into web projects. When combined with TypeScript, Heroicons becomes even more powerful as TypeScript adds static typing, making the code more robust and maintainable. This blog post will guide you through the fundamental concepts, usage methods, common practices, and best practices of using Heroicons with TypeScript.

Table of Contents#

  1. Fundamental Concepts
  2. Usage Methods
  3. Common Practices
  4. Best Practices
  5. Conclusion
  6. References

Fundamental Concepts#

Heroicons#

Heroicons offers two main styles: outline and solid. Outline icons have a hollow design, while solid icons are filled. These icons are designed to be simple, consistent, and easy to integrate into various projects. They are available in different sizes and can be customized with CSS.

TypeScript#

TypeScript is a superset of JavaScript that adds static typing. It helps catch errors early in the development process by providing type checking at compile - time. When using Heroicons with TypeScript, we can take advantage of type definitions to ensure that the correct icons are used and that the props passed to the icon components are valid.

Usage Methods#

Installation#

First, you need to install the @heroicons/react package. If you are using npm, run the following command:

npm install @heroicons/react

If you prefer yarn:

yarn add @heroicons/react

Importing Icons#

Once the package is installed, you can import icons into your TypeScript files. For example, to import an outline heart icon:

import { HeartIcon } from '@heroicons/react/outline';
 
const MyComponent: React.FC = () => {
    return (
        <div>
            <HeartIcon className="h-6 w-6 text-red-500" />
        </div>
    );
};
 
export default MyComponent;

To import a solid heart icon:

import { HeartIcon } from '@heroicons/react/solid';
 
const MySolidComponent: React.FC = () => {
    return (
        <div>
            <HeartIcon className="h-6 w-6 text-red-500" />
        </div>
    );
};
 
export default MySolidComponent;

Using Icons in a List#

You can also use Heroicons in a list to display multiple icons. Here is an example:

import { HomeIcon, UserIcon, ShoppingCartIcon } from '@heroicons/react/outline';
 
const iconList = [
    { name: 'Home', icon: HomeIcon },
    { name: 'User', icon: UserIcon },
    { name: 'Shopping Cart', icon: ShoppingCartIcon }
];
 
const IconListComponent: React.FC = () => {
    return (
        <ul>
            {iconList.map((item, index) => (
                <li key={index}>
                    <item.icon className="h-6 w-6 text-gray-500" />
                    <span>{item.name}</span>
                </li>
            ))}
        </ul>
    );
};
 
export default IconListComponent;

Common Practices#

Styling Icons#

Heroicons are SVG elements, so you can style them using CSS classes. You can change the size, color, and other properties. For example, to change the color of an icon to blue and set its size to 24 pixels:

import { CheckIcon } from '@heroicons/react/outline';
 
const StyledIconComponent: React.FC = () => {
    return (
        <div>
            <CheckIcon className="h-6 w-6 text-blue-500" />
        </div>
    );
};
 
export default StyledIconComponent;

Conditional Rendering of Icons#

You can use conditional rendering to display different icons based on certain conditions. For example, display a check icon if a task is completed, and a cross icon if it is not:

import { CheckIcon, XIcon } from '@heroicons/react/outline';
 
interface TaskProps {
    isCompleted: boolean;
}
 
const TaskComponent: React.FC<TaskProps> = ({ isCompleted }) => {
    return (
        <div>
            {isCompleted ? (
                <CheckIcon className="h-6 w-6 text-green-500" />
            ) : (
                <XIcon className="h-6 w-6 text-red-500" />
            )}
        </div>
    );
};
 
export default TaskComponent;

Best Practices#

Type Safety#

Since we are using TypeScript, make sure to define the types correctly. For example, if you are passing an icon component as a prop, define its type properly:

import React from 'react';
import { HomeIcon } from '@heroicons/react/outline';
 
interface IconProps {
    icon: React.ComponentType<React.SVGProps<SVGSVGElement>>;
}
 
const IconWrapper: React.FC<IconProps> = ({ icon }) => {
    return <icon className="h-6 w-6 text-gray-500" />;
};
 
const App: React.FC = () => {
    return (
        <div>
            <IconWrapper icon={HomeIcon} />
        </div>
    );
};
 
export default App;

Performance Optimization#

If you are using a large number of icons, consider lazy loading them. You can use React.lazy and Suspense to achieve this. For example:

const LazyHeartIcon = React.lazy(() => import('@heroicons/react/outline').then((mod) => ({ default: mod.HeartIcon })));
 
const LazyIconComponent: React.FC = () => {
    return (
        <div>
            <React.Suspense fallback={<div>Loading...</div>}>
                <LazyHeartIcon className="h-6 w-6 text-red-500" />
            </React.Suspense>
        </div>
    );
};
 
export default LazyIconComponent;

Conclusion#

Heroicons combined with TypeScript is a powerful combination for creating visually appealing and robust web applications. By understanding the fundamental concepts, usage methods, common practices, and best practices, you can efficiently integrate Heroicons into your TypeScript projects. TypeScript's static typing ensures that your code is more reliable, and Heroicons provides a wide range of high - quality icons to enhance your user interface.

References#

2025-10