⚡ 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 73.7% of websites from the Czech Republic.

Statistics based on 43K+ analyzed websites. About this data

⭐ 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 83.8% share.
It is followed by Facebook SDK with 23.2% and Swiper with 16.3%.

jQuery 83.8%
Facebook SDK 23.2%
Swiper 16.3%
Fancyapps 10.1%
Lightbox 9.4%
Slick 8.2%
Owl Carousel 8%
Polyfill 7.7%
ImagesLoaded 6.7%
Popper 6.7%
Magnific Popup 6.3%
Modernizr 6.2%
React 5.1%
jQuery Easing 4.8%
🍪 JS Cookie 4.7%

🚀 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 ^(-8)
5. Lightbox ^(-14)
7. Owl Carousel ^(-1)
10. Popper ^(-13)
11. Magnific Popup ^(-2)
14. jQuery Easing ^(-1)
16. Waypoints ^(-1)
18. Web Font Loader ^(-6)
19. Less.js ^(-62)

✨ Best JavaScript Libraries

Below is a more detailed list of the top 25 of the 275 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	83.8%
2	Facebook SDK Menlo Park, California, United States A library that provides client-side tools for Social Plugins, Login, and Graph API calls. Free	23.2%
3	Swiper Weston, Florida, United States A modern touch slider library for building responsive sliders and carousels with hardware-accelerated transitions. FreeOpen source	16.3%
4	Fancyapps Ogre, Latvia A commercial JavaScript UI component library for creating lightboxes, carousels, and interactive image viewers. €29+	10.1%
5	Lightbox San Francisco, California, United States The original lightbox library used to overlay images on top of the current page. FreeOpen source	9.4%
6	Slick New York, United States An open-source jQuery carousel library for creating responsive, touch-enabled, and keyboard-accessible content sliders. FreeOpen source	8.2%
7	Owl Carousel Germany A deprecated open-source jQuery plugin for creating responsive, touch-enabled, and accessible carousel sliders. FreeOpen sourceLegacy	8%
8	Polyfill London, United Kingdom An open-source JavaScript library that provides modern web API features to older browsers that do not natively support them. FreeOpen source	7.7%
9	ImagesLoaded Alexandria, Virginia, United States An open-source JavaScript library that detects when images and CSS background images have finished loading, allowing code to run only after loading is complete. FreeOpen source	6.7%
10	Popper Monza, Italy An open-source JavaScript library for positioning and displaying floating UI elements such as tooltips, popovers, and dropdowns. FreeOpen source	6.7%
11	Magnific Popup Kyiv, Ukraine A responsive lightbox and dialog plugin for jQuery and Zepto.js. FreeOpen sourceLegacy	6.3%
12	Modernizr San Francisco, California, United States An open-source feature detection library that identifies browser support for HTML, CSS, and JavaScript features and allows websites to adapt accordingly. FreeOpen source	6.2%
13	React Menlo Park, California, United States A popular open-source JavaScript library for building dynamic user interfaces through reusable and stateful UI components, originally created by Facebook. FreeOpen source	5.1%
14	jQuery Easing Wilberfoss, North Yorkshire, United Kingdom A jQuery plugin that adds 10+ advanced easing animations. FreeOpen source	4.8%
15	🍪 JS Cookie Germany An open-source, lightweight JavaScript library for managing browser cookies. FreeOpen source	4.7%
16	Waypoints West Linn, Oregon, United States An open-source JavaScript library that executes functions when users scroll to specific elements on a web page. FreeOpen source	4.1%
17	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	4%
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	Less.js Switzerland A JavaScript library that converts Less styles to CSS styles. FreeOpen source	3.5%
20	Isotope Alexandria, Virginia, United States A commercial JavaScript library for creating filterable and sortable grid layouts. FreeOpen source$25+	3.5%
21	jQuery Cookie Germany A deprecated jQuery plugin for reading, writing and deleting cookies. FreeOpen sourceLegacy	3.2%
22	FlexSlider San Francisco, California, United States A responsive jQuery slider created by the WooCommerce team and included with WooCommerce. FreeOpen source	3.2%
23	Select2 Boston, Massachusetts, United States A jQuery-based replacement for HTML select elements that enhances dropdown inputs with advanced search and selection capabilities. FreeOpen source	3.2%
24	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	3.1%
25	jQuery Mousewheel San Francisco, California, United States A jQuery plugin that adds cross-browser mouse wheel support with delta normalization. FreeOpen sourceLegacy	3%

👉 See Also

🌎 JavaScript Libraries in other countries

🗃️ About This Data

We evaluate the popularity of technologies based on the number of websites where we detect their usage.
Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
This report is based on the analysis of 43,877 websites from the Czech Republic.
We currently track the presence of 312 JavaScript libraries across the web.
Of these, 275 were detected on websites from the Czech Republic.
Statistics were last calculated on September 19, 2026.
For more details, see our methodology and disclaimer.