Docs: Updated the custom elements documentation to include $host

documentation/docs/07-misc/04-custom-elements.md

@@ -4,7 +4,7 @@ title: Custom elements
 
 <!-- - [basically what we have today](https://svelte.dev/docs/custom-elements-api) -->
 
-Svelte components can also be compiled to custom elements (aka web components) using the `customElement: true` compiler option. You should specify a tag name for the component using the `<svelte:options>` [element](svelte-options).
+Svelte components can also be compiled to custom elements (aka web components) using the `customElement: true` compiler option. You should specify a tag name for the component using the `<svelte:options>` [element](svelte-options). Within the custom element you can also access the host element and do things such as dispatching events using the [\$host](https://svelte.dev/docs/svelte/$host) rune.
 
 ```svelte
 <svelte:options customElement="my-element" />
@@ -128,4 +128,3 @@ Custom elements can be a useful way to package components for consumption in a n
 - Polyfills are required to support older browsers
 - You can use Svelte's context feature between regular Svelte components within a custom element, but you can't use them across custom elements. In other words, you can't use `setContext` on a parent custom element and read that with `getContext` in a child custom element.
 - Don't declare properties or attributes starting with `on`, as their usage will be interpreted as an event listener. In other words, Svelte treats `<custom-element oneworld={true}></custom-element>` as `customElement.addEventListener('eworld', true)` (and not as `customElement.oneworld = true`)
-- If you would like to dispatch custom events or just access the host element then you can use the [\$host](https://svelte.dev/docs/svelte/$host) rune.