# Installation

crowne has four ways to send events. Most sites need only one; a site can use more than one, such as the script tag for page views and the server package for payments.

| Method                                | Use it when                                                     | Counts page views on its own | Needs a key |
| ------------------------------------- | --------------------------------------------------------------- | ---------------------------- | ----------- |
| [Script tag](./install/script.md)     | You can edit your pages' HTML. The quickest start.              | Yes                          | No          |
| [npm package](./install/npm.md)       | Your app has a bundler, and you want no third-party script.     | Yes                          | No          |
| [Server package](./install/server.md) | The action happens on your server, or your pages run no script. | No                           | Yes         |
| [REST API](./api.md)                  | Any other language or platform, with no package.                | No                           | For servers |

## Script tag

One line in your pages' `<head>`. It counts page loads, in-app navigation, and back/forward restores, and gives your pages a global `crowne()` for custom events. Use it on any site where you can edit the HTML, including sites from a site builder.

## npm package

`crowne/browser` does what the script tag does, from inside your bundle. Use it in apps with a bundler, such as React or Svelte apps, when you want typed calls and no extra script request.

## Server package

`crowne/server` sends events from a server, such as a Cloudflare Worker or Node, with a secret key. Use it for actions the browser does not see, such as a payment or an API call, and for pages that run no script. It also serves the [first-party proxy](./proxy.md).

## REST API

Every package calls the [REST API](./api.md). Call it yourself from any language: a browser can send events with only the site id, and a server sends them with a key.

## Fewer blocked visits

Any of the browser methods can load and send through your own domain, so ad blockers drop fewer visits. See [Ad blockers](./blockers.md).