> ## Documentation Index
> Fetch the complete documentation index at: https://docs.phantom.com/llms.txt
> Use this file to discover all available pages before exploring further.
> To detect if a user has already installed Phantom, a web application should check for the existence of a phantom object.
# Detect the provider
**The `window.phantom.bitcoin` provider has been deprecated.**
Phantom's browser extension and mobile in-app browser will both inject a `phantom` object into the [window](https://developer.mozilla.org/en-US/docs/Web/API/Window) of any web application the user visits, provided that site is using `https://`, on `localhost`, or is `127.0.0.1`. Phantom will not inject the provider into [iframes](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/iframe) or sites using `http://`.
If a `phantom` object exists, Bitcoin and Ordinals dapps can interact with Phantom via the API found at `window.phantom.bitcoin`. To detect if Phantom is installed, an application should check for an additional `isPhantom` flag like so:
```typescript theme={null}
const isPhantomInstalled = window?.phantom?.bitcoin?.isPhantom
```
If Phantom is not installed, we recommend you redirect your users to our website `https://phantom.com/`. Altogether, this may look like the following:
```typescript theme={null}
const getProvider = () => {
if ('phantom' in window) {
const anyWindow: any = window;
const provider = anyWindow.phantom?.bitcoin;
if (provider && provider.isPhantom) {
return provider;
}
}
window.open('https://phantom.com/', '_blank');
};
```
When adding a Phantom button to your dapp’s wallet modal, we recommend using the name “Phantom” with an SVG/PNG icon, which you can find in [Logos and assets](/resources/assets).
