wehub-resource-sync
17 lines
829 B
Markdown
17 lines
829 B
Markdown
---
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title: React to events in the Viewer
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order: 400
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---
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We support registering callbacks to Viewer events in these environments:
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- Web browsers, through our [JS package](../integrations/embed-web.md#callbacks)
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- Jupyter notebooks, through our [Notebook API](../integrations/embed-notebooks.md#reacting-to-events-in-the-viewer)
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For users extending the Viewer through the Rust [`re_viewer`](https://docs.rs/re_viewer/latest/re_viewer/) crate, there are two options:
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- Use [`StartupOptions.on_event`](https://docs.rs/re_viewer/latest/re_viewer/struct.StartupOptions.html#structfield.on_event) to register
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the same events available on the web and in Jupyter.
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- [Extend the UI](https://github.com/rerun-io/rerun/tree/main/examples/rust/custom_callback) to add your own widgets using `egui`, and
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fire completely custom events.
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