⚡ JavaScript Libraries in Japan

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.

Japan is an East Asian country with a population of around 125 million people.

According to our statistics, JavaScript libraries are used on 79.7% of websites from Japan.

⭐ Most Popular in 2026

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

The most popular is jQuery, which dominates the market with an overwhelming 91.7% share.
It is followed by Slick with 22.5% and Swiper with 18.8%.

jQuery 91.7%
Slick 22.5%
Swiper 18.8%
Facebook SDK 14.3%
Polyfill 11.4%
X for Websites 10.6%
jQuery Easing 10.5%
bxSlider 7%
Lazysizes 6.8%
jQuery Cookie 6.4%
Lightbox 6.1%
Fancyapps 5%
Regenerator 4.5%
FlexSlider 4.4%
ImagesLoaded 4.3%

🚀 Highlights

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

2. Slick ^(-4)
6. X for Websites ^(-30)
7. jQuery Easing ^(-11)
8. bxSlider ^(-29)
9. Lazysizes ^(-20)
10. jQuery Cookie ^(-20)
11. Lightbox ^(-9)
12. Fancyapps ^(-1)
13. Regenerator ^(-9)
14. FlexSlider ^(-5)

✨ Best JavaScript Libraries

Below is a more detailed list of the top 25 of the 289 JavaScript libraries used on sites from Japan, 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	91.7%
2	Slick An open-source, fully responsive and accessible carousel library. FreeOpen source	22.5%
3	Swiper Weston, Florida, United States A modern touch slider library for building responsive sliders and carousels with hardware-accelerated transitions. FreeOpen source	18.8%
4	Facebook SDK Menlo Park, California, United States A library that provides client-side tools for Social Plugins, Facebook Login, and Graph API calls. Free	14.3%
5	Polyfill An open-source JavaScript library that provides modern web API features to older browsers that do not natively support them. FreeOpen source	11.4%
6	X for Websites Bastrop, Texas, United States A suite of tools bringing X content and functionality to your webpages and apps, enabling the X audience to share your content, and follow your X accounts.	10.6%
7	jQuery Easing Wilberfoss, North Yorkshire, United Kingdom A jQuery plugin that adds 10+ advanced easing animations. FreeOpen source	10.5%
8	bxSlider An open-source, fully loaded, responsive jQuery content slider. FreeOpen source	7%
9	Lazysizes Berlin, Germany A fast lazy loader library for images, iframes, and scripts/widgets. FreeOpen source	6.8%
10	jQuery Cookie A deprecated jQuery plugin for reading, writing and deleting cookies. FreeOpen sourceLegacy	6.4%
11	Lightbox San Francisco, California, United States The original lightbox library used to overlay images on top of the current page. FreeOpen source	6.1%
12	Fancyapps A commercial library of JavaScript UI components that includes lightbox, carousel, and pan/zoom components. €29+	5%
13	Regenerator Menlo Park, California, United States A JavaScript library from Facebook that allows the use of ES6 generators in older browsers. FreeOpen source	4.5%
14	FlexSlider San Francisco, California, United States A responsive jQuery slider created by the WooCommerce team and included with WooCommerce. FreeOpen source	4.4%
15	ImagesLoaded Alexandria, Virginia, United States A JavaScript library that detects when images have been loaded. FreeOpen source	4.3%
16	Modernizr A JavaScript library that detects the availability of HTML, CSS and JavaScript features in the user's browser. FreeOpen source	4.2%
17	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%
18	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	3.8%
19	Wow.js A JavaScript library that reveals CSS animations when you scroll. FreeOpen source	3.4%
20	🍪 JS Cookie Germany A simple, lightweight JavaScript library for handling browser cookies. FreeOpen source	2.8%
21	React Menlo Park, California, United States A popular open-source JavaScript library for building dynamic user interfaces, created by Facebook. FreeOpen source	2.7%
22	Masonry Alexandria, Virginia, United States A cascading grid layout library that places elements in optimal positions based on available vertical space. FreeOpen source	2.7%
23	SmoothScroll Smooth scrolling experience for websites. FreeOpen source	2.7%
24	jQuery Colorbox A lightweight, customizable lightbox plugin for jQuery. FreeOpen source	2.6%
25	Clipboard.js A modern approach to copy text to clipboard. FreeOpen source	2.6%

👉 See Also

✨ Related Technologies
- JavaScript
🌎 JavaScript Libraries in other countries

Data is based on the analysis of 157,183 websites from Japan.
Statistics were last calculated on March 20, 2026.
For details, see our methodology and disclaimer.