How to use Ionicons in a React application?

Ionicons can be integrated via the Web Component by adding the script tags from the README, but for better React compatibility, you might need to wrap the ion-icon element or use a library that supports custom elements. Ensure your build process handles the dynamic imports.

What's the difference between filled, outline, and sharp icons in Ionicons?

Filled icons are solid, outline icons have strokes for a lighter look, and sharp icons use angular edges for a modern style. The README explains that filled variants use the base name, while outline and sharp add suffixes like 'heart-outline'.

Can I use Ionicons without the Ionic Framework?

Yes, Ionicons is standalone and can be used in any web project by including the script tags as shown in the README. It's MIT-licensed, so there are no restrictions on usage, though setup requires manual integration.

How to change the stroke width of outline icons?

You can adjust the stroke width by applying the CSS custom property '--ionicon-stroke-width' to the ion-icon element, with the default set to 32px. This allows fine-tuning for visual balance, as described in the README's stroke width section.

Ionicons vs Font Awesome: which is better for mobile apps?

Ionicons is optimized for mobile with built-in iOS and Material Design variants, making it ideal for cross-platform apps, while Font Awesome offers a larger library but may require extra work for platform-specific styling. Ionicons' Web Component also provides performance benefits for on-demand loading.

Are there any performance issues with Ionicons in large apps?

Ionicons is designed for performance by loading only visible icons dynamically, reducing initial bundle size. However, if many icons are used, the sequential HTTP requests for SVGs could impact load times, so consider preloading or bundling for critical paths.

How to add custom SVG icons to Ionicons?

Use the 'src' attribute on ion-icon to load external SVG files, or set a custom asset path with 'setAssetPath' from the ionicons package to integrate your own icon set alongside the default library, as detailed in the README's custom icons section.

Ion icons — Premium Open-Source Icon Set

What is Ion icons?

Ionicons is an open-source icon library containing over 1,300 professionally designed icons for use in web and mobile applications. It provides multiple visual variants (filled, outline, sharp) and platform-specific versions to ensure icons feel native across iOS, Android, and desktop. The project solves the need for a consistent, high-quality icon set that developers can freely use in both personal and commercial projects.

Target Audience

Frontend developers and designers building web applications, Ionic Framework apps, or cross-platform mobile apps who need a comprehensive, performant icon solution. It's especially valuable for teams requiring icons that adapt to different platforms (iOS/Material) without maintaining multiple assets.

Value Proposition

Developers choose Ionicons for its extensive icon collection, built-in platform variants, and lightweight Web Component that loads only visible icons. Unlike many icon sets, it offers dedicated iOS and Material Design styles out of the box, is MIT-licensed for unrestricted use, and integrates seamlessly with modern frameworks.

Premium hand-crafted icons built by Ionic, for Ionic apps and web apps everywhere 🌎

Use Cases

Best For

Adding consistent, high-quality icons to Ionic Framework applications
Building cross-platform apps that need iOS and Material Design icon variants
Web projects requiring performant, on-demand SVG icon loading
Design systems that need multiple icon styles (filled, outline, sharp)
Teams needing a free, commercially usable alternative to premium icon sets
Projects where custom SVG icons must be mixed with a standard icon library

Not Ideal For

Projects requiring server-side rendering with zero JavaScript dependency
Teams using frameworks with poor Web Component support, like some older jQuery-based systems
Designs needing highly customized icon styles beyond filled, outline, or sharp variants
Applications with ultra-strict bundle size limits that prefer inline SVGs over dynamic loading

Pros & Cons

Pros

Extensive Icon Collection

With over 1,300 hand-crafted icons covering common UI needs, Ionicons provides a comprehensive set that reduces the need for external icon resources, as stated in the README's description.

Platform-Specific Variants

Icons include Material Design and iOS versions, allowing developers to specify different icons per platform using the 'ios' and 'md' attributes for a native feel, as detailed in the README under platform specificity.

Performance Optimization

The Web Component loads SVGs on-demand only for visible icons, minimizing network requests and improving performance, which the README highlights as a key feature.

Multiple Style Options

Each icon offers filled, outline, and sharp variants for design flexibility, with examples like 'heart-outline' provided in the README's variants section.

Custom Icon Integration

Support for external SVG files via the 'src' attribute and custom asset paths using 'setAssetPath' allows seamless mixing with bespoke icon sets, as explained in the README.

Cons

JavaScript Dependency

Ionicons relies on Web Components and dynamic SVG loading, making it unsuitable for environments where JavaScript is disabled or for pure server-side rendering without client-side hydration.

Limited Variant Options

Icons are restricted to filled, outline, and sharp styles, with logo icons lacking outline or sharp variants, which may not cover all design needs, as noted in the README.

Breaking Changes in Updates

Migrating between major versions, such as from v4 to v5, involves icon deletions and renames, requiring manual updates and causing potential disruption, as mentioned in the migration section.

Setup Complexity for Non-Ionic Projects

While versatile, integration outside Ionic Framework requires manual script inclusion and configuration, such as using esm.sh, which adds overhead compared to drop-in solutions.

Frequently Asked Questions

What is Ion icons?

Target Audience

Value Proposition

Use Cases

Best For

Adding consistent, high-quality icons to Ionic Framework applications
Building cross-platform apps that need iOS and Material Design icon variants
Web projects requiring performant, on-demand SVG icon loading
Design systems that need multiple icon styles (filled, outline, sharp)
Teams needing a free, commercially usable alternative to premium icon sets
Projects where custom SVG icons must be mixed with a standard icon library

Not Ideal For

Projects requiring server-side rendering with zero JavaScript dependency
Teams using frameworks with poor Web Component support, like some older jQuery-based systems
Designs needing highly customized icon styles beyond filled, outline, or sharp variants
Applications with ultra-strict bundle size limits that prefer inline SVGs over dynamic loading

Pros & Cons

Pros

Extensive Icon Collection

With over 1,300 hand-crafted icons covering common UI needs, Ionicons provides a comprehensive set that reduces the need for external icon resources, as stated in the README's description.

Platform-Specific Variants

Performance Optimization

The Web Component loads SVGs on-demand only for visible icons, minimizing network requests and improving performance, which the README highlights as a key feature.

Multiple Style Options

Each icon offers filled, outline, and sharp variants for design flexibility, with examples like 'heart-outline' provided in the README's variants section.

Custom Icon Integration

Support for external SVG files via the 'src' attribute and custom asset paths using 'setAssetPath' allows seamless mixing with bespoke icon sets, as explained in the README.

Cons

JavaScript Dependency

Ionicons relies on Web Components and dynamic SVG loading, making it unsuitable for environments where JavaScript is disabled or for pure server-side rendering without client-side hydration.

Limited Variant Options

Icons are restricted to filled, outline, and sharp styles, with logo icons lacking outline or sharp variants, which may not cover all design needs, as noted in the README.

Breaking Changes in Updates

Migrating between major versions, such as from v4 to v5, involves icon deletions and renames, requiring manual updates and causing potential disruption, as mentioned in the migration section.

Setup Complexity for Non-Ionic Projects

While versatile, integration outside Ionic Framework requires manual script inclusion and configuration, such as using esm.sh, which adds overhead compared to drop-in solutions.

Frequently Asked Questions

Ion icons

What is Ion icons?

Overview

Use Cases

Best For

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions

Related Projects

Found a gem we're missing?

Ion icons

What is Ion icons?

Overview

Use Cases

Best For

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions

Related Projects

Found a gem we're missing?