> For the complete documentation index, see [llms.txt](https://docs.casava.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.casava.co/widget/javascript-popup-widget.md).
# Javascript Popup Widget
## Usage
These instructions will get you a copy of the project up and running on your local machine for development and testing purposes.
```javascript
casava widget Example
Test widget payload
```
**Key things to point out on this code:**
First, you include the Casava Inline library with a script tag:
```
```
Next, Get your partner public key from your partner sandbox dashboard at [https://partner.sandbox.casava.co](http://partner.sandbox.casava.co/)
Now setup your button to call the Casava widget. `CasavaCheckout()` with your partner public key and other custom parameters
## Calling `CasavaCheckout()`
The `key` is your Casava public key. **This is the only compulsory parameter when calling this checkout function.**
The `name` is your customer name. This can also be first name and last name separated with space in this format `John Doe`
The `email` is your customer email
The `phone` is your customer phone number
The `salary` is your customer salary
The `companyName` is your customer company name
The `companyAddress` is your customer company address
The `onClose` is a method that is called when the modal is closed
The `callback` is a method that is called once the customer buys a policy
The `onError` is a method that is called once an error occurs