Fetch

Swaps library views in from the REST route without a page load.

The Listen page: the library, the demo's four albums as drawn record covers — This grid came from the library REST route; clicking a cover fetches that post and swaps it in.

How Riff uses it

The Listen app fetches the library and each post from the plugin's REST route with a JSON Accept header, and memoises each promise so going back is instant. A non-2xx response throws and the entry is dropped from the cache.

Why

Swapping views without a page load is what keeps the music playing, and the cache is why Back feels instant.

Without it

A failed fetch sends the browser to the real URL with a full navigation.

Where

plugins/riff/features/listen/app/fetch.js, line 84

fetch( href, { headers: { Accept: 'text/html' } } )

plugins/riff/features/listen/app/views.js, line 45
```
to.browse ? to.href : ctx.addressOf( id, upto )
```

Links open the source at the commit this page was published from.

Specification: Fetch Standard. Reference: Fetch on MDN.