---
title: "Getting started with LemonadeJS v2"
description: "LemonadeJS v2 archive. Getting started with LemonadeJS, basic reactive concepts, install and documentation."
source: https://lemonadejs.com/docs/v2/getting-started/
---
Getting started
===============
LemonadeJS version 2 is about 6 KBytes
LemonadeJS is a free and powerful micro reactive JavaScript library to help build web-based interfaces. It does not require any transpile or dependencies. It can run using NodeJS or just the preferable web browser.
You can build from a simple widget to more advanced web-based applications.
Installation
------------
The reactive LemonadeJS can be installed using one of the following methods.
### CDN
```xml
```
### NPM installation
```bash
npm install lemonadejs
```
### Source code (MIT)
[https://github.com/lemonadejs/lemonadejs](https://github.com/lemonadejs/lemonadejs)
Official components
-------------------
The LemonadeJS official components are javascript implementation of common application required libraries.
### Pico Library
The Pico library is a special collection of highly optimize components that does not require any dependencies and has a limit of 1.8 KBytes each. You can visit our [official libraries](/docs/v2/library/) page to know discover more about it.
The concept of LemonadeJS
-------------------------
The `self` is an object where you define properties and methods. The self is bound to a template, and when the self properties are used in the template, they are included in the observer controller, so each change in the property value reflects automatically in the HTML.
### Data binding
When a property is used in the template, all updates in the property value will affect the necessary DOM in the rendered template. In the example below, for each update in the `self.count` value, only the necessary DOM element will be updated.
```html
```
We will explore more about the javascript two-way binding in HTML elements in the next few chapters, but first lets learn more about the LemonadeJS special attributes.
[Next chapter: LemonadeJS attributes](/docs/v2/attributes/)