serve: Rewrite of the Server-Sent Event code for build notifications. At the moment the server monitors the asset directories, and notifies the browser when an asset has changed and has been re-processed. * Fix issues around long-running requests/threads which mess up the ability to shutdown the server correctly with `CTRL-C` (see comments in code). * Move the notification queue to each SSE producer, to support having multiple pages open in a browser. * Add JS/CSS for showing quick notifications about re-processed assets. * Add support for hot-reloading CSS and pictures that have been re-processed.

---
title: Plugin Components
---

Once you've [created a plugin][1], you need to make it provide new _components_.

{% for comp in family.children -%}
* [{{comp.title}}]({{comp.url}})
{% endfor %}

[1]: {{apiurl('plugins')}}