# Offline Fallbacks

Workbox makes it easy to create robust offline experiences in web applications. When a user navigates to a page without an internet connection, instead of showing an error, your application can serve a predefined fallback page, image or font.

{% code title="/config/packages/pwa.yaml" lineNumbers="true" %}

```yaml
pwa:
    serviceworker:
        enabled: true
        src: "sw.js"
        workbox:
            offline_fallback:
                page: 'app_offline_page'
                image: 'images/offline.svg'
                font: 'fonts/normal.ttf'
```

{% endcode %}

`page_fallback` can be a relative URL, a route name or a route name with parameters. See [URL parameter](/1.3.x/the-manifest/shortcuts.md#url-parameter) for more information.

`image_fallback` and `font_fallback` refer to assets delivered by Asset Mapper or an URL to the font file.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://pwa.spomky-labs.com/1.3.x/the-service-worker/workbox/offline-fallback.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.