⚡ JavaScript Libraries in the Czech Republic

JavaScript libraries are collections of prewritten code that provide reusable functions and components for building interactive features and handling common client-side tasks in web applications.

The Czech Republic is a Central European country with a population of around 10.5 million people.

According to our statistics, JavaScript libraries are used on 73.3% of websites from the Czech Republic.

⭐ Most Popular in 2026

The following chart shows the top JavaScript libraries in the Czech Republic in 2026, based on market share.

The most popular is jQuery, which dominates the market with an overwhelming 85.2% share.
It is followed by Facebook SDK with 23.8% and Swiper with 14.5%.

jQuery 85.2%
Facebook SDK 23.8%
Swiper 14.5%
Fancyapps 10.5%
Lightbox 9.8%
Polyfill 8.5%
Owl Carousel 8.3%
Slick 8.3%
SystemJS 7%
Modernizr 6.8%
ImagesLoaded 6.7%
Magnific Popup 6.4%
Popper 5.8%
Waypoints 5.4%
jQuery Easing 5.4%

🚀 Highlights

Here is a list of the top libraries that are more popular in the Czech Republic than worldwide.
Differences between global and country rankings are shown in parentheses.

2. Facebook SDK ^(-1)
4. Fancyapps ^(-9)
5. Lightbox ^(-15)
9. SystemJS ^(-14)
10. Modernizr ^(-2)
12. Magnific Popup ^(-2)
13. Popper ^(-12)
15. jQuery Easing ^(-3)
18. Web Font Loader ^(-9)
19. Isotope ^(-2)

✨ Best JavaScript Libraries

Below is a more detailed list of the top 25 of the 267 JavaScript libraries used on sites from the Czech Republic, ranked by their market share.

Rank	Name	Market share
1	jQuery San Francisco, California, United States A fast, small, feature-rich JavaScript library designed to simplify HTML DOM tree traversal and manipulation, event handling, CSS animations, and Ajax. FreeOpen source	85.2%
2	Facebook SDK Menlo Park, California, United States A library that provides client-side tools for Social Plugins, Facebook Login, and Graph API calls. Free	23.8%
3	Swiper Weston, Florida, United States A modern touch slider library for building responsive sliders and carousels with hardware-accelerated transitions. FreeOpen source	14.5%
4	Fancyapps A commercial library of JavaScript UI components that includes lightbox, carousel, and pan/zoom components. €29+	10.5%
5	Lightbox San Francisco, California, United States The original lightbox library used to overlay images on top of the current page. FreeOpen source	9.8%
6	Polyfill An open-source JavaScript library that provides modern web API features to older browsers that do not natively support them. FreeOpen source	8.5%
7	Owl Carousel Germany A touch enabled jQuery plugin that lets you create a beautiful, responsive carousel slider. FreeOpen source	8.3%
8	Slick An open-source, fully responsive and accessible carousel library. FreeOpen source	8.3%
9	SystemJS Vancouver, Canada A hookable, standards-based, dynamic ES module module loader. FreeOpen source	7%
10	Modernizr A JavaScript library that detects the availability of HTML, CSS and JavaScript features in the user's browser. FreeOpen source	6.8%
11	ImagesLoaded Alexandria, Virginia, United States A JavaScript library that detects when images have been loaded. FreeOpen source	6.7%
12	Magnific Popup A responsive lightbox and dialog plugin for jQuery and Zepto.js. FreeOpen sourceLegacy	6.4%
13	Popper Monza, Italy A JavaScript library used for positioning and displaying tooltips, popovers, and dropdowns. FreeOpen source	5.8%
14	Waypoints West Linn, Oregon, United States A library that makes it easy to execute a function whenever you scroll to an element. FreeOpen source	5.4%
15	jQuery Easing Wilberfoss, North Yorkshire, United Kingdom A jQuery plugin that adds 10+ advanced easing animations. FreeOpen source	5.4%
16	🍪 JS Cookie Germany A simple, lightweight JavaScript library for handling browser cookies. FreeOpen source	4.8%
17	React Menlo Park, California, United States A popular open-source JavaScript library for building dynamic user interfaces, created by Facebook. FreeOpen source	4.1%
18	Web Font Loader San Jose, California, United States A JavaScript library that gives you added control when using linked fonts via @font-face. FreeOpen source	3.9%
19	Isotope Alexandria, Virginia, United States A commercial JavaScript library for creating filterable and sortable grid layouts. FreeOpen source$25+	3.8%
20	FlexSlider San Francisco, California, United States A responsive jQuery slider created by the WooCommerce team and included with WooCommerce. FreeOpen source	3.7%
21	Less.js A JavaScript library that converts Less styles to CSS styles. FreeOpen source	3.6%
22	jQuery Cookie A deprecated jQuery plugin for reading, writing and deleting cookies. FreeOpen sourceLegacy	3.6%
23	Lottie San Francisco, California, United States An animation framework created by Airbnb that lets developers export Adobe After Effects animations as JSON and render them natively on mobile, desktop, and the web. FreeOpen source	3.5%
24	MediaElement.js Dallas, Texas, United States A free audio and video player with support for media files (MP4, WebM, MP3), streaming content (HLS, Dash), and embeddable players (YouTube, Facebook, Vimeo, Twitch, SoundCloud, etc). FreeOpen source	3.4%
25	Underscore.js Boston, Massachusetts, United States A utility library for JavaScript that provides support for functional programming helpers (each, map, reduce, filter) without extending any built-in JavaScript objects. FreeOpen source	3.3%

👉 See Also

✨ Related Technologies
- JavaScript
🌎 JavaScript Libraries in other countries

Data is based on the analysis of 36,165 websites from the Czech Republic.
Statistics were last calculated on March 20, 2026.
For details, see our methodology and disclaimer.