LeafletJS免费开源JS互动地图是基于JavaScriptlibrary开发的支持手机应用程序的互动地图，免费开源，用户可以自由下载使用。
LeafletJS的体积只有28KB，操作简单，性能优越，可用性极强，主要支持台式机和移动平台的使用，支持HTML5和CSS3，支持API访问，帮助设计师开发提高工作效率。
Leaflet is a modern open-source JavaScript library for mobile-friendly interactive maps. It is developed by Vladimir Agafonkin with a team of dedicated contributors. Weighing just about 28 KB of JS code, it has all the features most developers ever need for online maps.
Leaflet is designed with simplicity, performance and usability in mind. It works efficiently across all major desktop and mobile platforms out of the box, taking advantage of HTML5 and CSS3 on modern browsers while still being accessible on older ones. It can be extended with many plugins, has a beautiful, easy to use and well-documented API and a simple, readable source code that is a joy to contribute to.