> ## Documentation Index
> Fetch the complete documentation index at: https://docs.hotglue.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Vanilla JS Setup
> Using the Widget as a CDN installation
You can install the hotglue widget via the following CDN distribution:
```html theme={null}
```
Next, you can initialize the widget using your hotglue [environment ID](/api-reference/overview#environment-id) and [public API key](/api-reference/overview#api-key):
```html theme={null}
Hotglue Widget
```
For custom validation before credentials are submitted in React, call the `setCredentialsValidator` handler returned by `useHotglue`. See the full [setCredentialsValidator](/widget-v3/reference/setCredentialsValidator) reference.
Finally, you can open the widget `hotglue.openWidget()`
```html theme={null}
Hotglue Widget
```