---
title: "Reactive Example with LemonadeJS v5"
description: "LemonadeJS v5 archive. Learn how to create a simple state change using LemonadeJS Version 5."
source: https://lemonadejs.com/docs/v5/examples/lamp/
---
# Lamp
LemonadeJS supports dynamic property strings to automatically update the UI when a property changes.
## A working example
```html
```
```javascript
export default function Lamp() {
this.value = 'on'
return render => render``;
}
```
[See this example on codesandbox](https://codesandbox.io/s/reactive-javascript-library-83xmr7)