In-progress major version, developed on the master branch.
[View Changelog](https://github.com/Leaflet/Leaflet/blob/master/CHANGELOG.md)
Note that the master version can contain incompatible changes, so please read the changelog carefully when upgrading to it.
### Using a Hosted Version of Leaflet
The latest stable release of Leaflet is hosted on a CDN — to start using
it straight away, place this in the `head` section of your HTML code:
### Leaflet Source Code
These download packages above only contain the library itself. If you want to download the full source code, including unit tests, files for debugging, build scripts, etc., you can download it from the GitHub repository.
### Building Leaflet from the Source
Leaflet build system is powered by the [Node.js](http://nodejs.org) platform and Jake, JSHint and UglifyJS libraries, which install easily and work well across all major platforms. Here are the steps to install it:
1. [Download and install Node](http://nodejs.org)
2. Run the following commands in the command line:
npm install -g jake
npm install
Now that you have everything installed, run `jake` inside the Leaflet directory. This will check Leaflet source files for JavaScript errors and inconsistencies, and then combine and compress it to the `dist` folder.
### Building a Custom Version of Leaflet
To make a custom build of the library with only the things you need, open `build/build.html` page of the Leaflet source code contents, choose the components (it figures out dependencies for you) and then run the command generated with it.