docs: prefetch tap fallback on slow connection and ignore slow connec…

…tion option (#5393)

Co-authored-by: Bjorn Lu <[email protected]>
Co-authored-by: Sarah Rainsberger <[email protected]>

src/content/docs/en/guides/prefetch.mdx

@@ -46,7 +46,7 @@ You can specify a strategy for an individual link by passing it to the `data-ast
 
 Each strategy is fine-tuned to only prefetch when needed and save your users' bandwidth. For example:
 
-- If a visitor is using [data saver mode](https://developer.mozilla.org/en-US/docs/Web/API/NetworkInformation/saveData) or has a [slow connection](https://developer.mozilla.org/en-US/docs/Web/API/NetworkInformation/effectiveType), prefetching will be turned off.
+- If a visitor is using [data saver mode](https://developer.mozilla.org/en-US/docs/Web/API/NetworkInformation/saveData) or has a [slow connection](https://developer.mozilla.org/en-US/docs/Web/API/NetworkInformation/effectiveType), prefetch will fallback to the `tap` strategy.
 - Quickly hovering or scrolling over links will not prefetch them.
 - Links that use the `viewport` strategy are prefetched with a lower priority to avoid clogging up the network.
 
@@ -114,7 +114,14 @@ prefetch('/about', { with: 'fetch' });
 prefetch('/about', { with: 'link' });
 ```
 
-The `prefetch()` API includes the same [data saver mode](https://developer.mozilla.org/en-US/docs/Web/API/NetworkInformation/saveData) and [slow connection](https://developer.mozilla.org/en-US/docs/Web/API/NetworkInformation/effectiveType) detection, so that it only prefetches when needed.
+The `prefetch()` API includes the same [data saver mode](https://developer.mozilla.org/en-US/docs/Web/API/NetworkInformation/saveData) and [slow connection](https://developer.mozilla.org/en-US/docs/Web/API/NetworkInformation/effectiveType) detection so that it only prefetches when needed.
+
+To ignore slow connection detection, you can use the `ignoreSlowConnection` option:
+
+```js
+// Prefetch even on data saver mode or slow connection
+prefetch('/about', { ignoreSlowConnection: true });
+```
 
 Make sure to only import `prefetch()` in client-side scripts as it relies on browser APIs.