If you use react, consider taking a look at my library react-tech-tree. It has support for tooltips, styling, etc.

Please check out the demo by visiting https://ldd.github.io/tech-tree-js

• use a TexturePacker spritesheet or individual images
• horizontal, vertical and even radial tech trees
• multiple parents for a single technology

Download the minified file and optinally, the source map. Include the minified file and the dependencies in your html file

    <script src="lib/d3.min.js"></script>
    <script src="lib/saveSvgAsPng.min.js"></script>
    <script src="js/techTree.min.js"></script>

To build, be sure you have node and npm installed.

Ideally, you should also have gulp installed globally.

Clone the directory using git:

git clone https://github.com/ldd/techtreejs

Install dependencies:

npm install

Build:

gulp

Run a webserver

gulp serve

Then open a browser and go to localhost:8000 to see the site.

Art assets used under the CC-BY 3.0 License

• J. W. Bjerk (eleazzaar) -- www.jwbjerk.com/art -- find this and other open art at: http://opengameart.org
• Henrique Lazarini -- ails.deviantart.com

Libraries used under the MIT License

• d3
• saveSvgAsPng

Copyright (C) 2017 ldd