posit-dev / posit-dev/py-shiny
Feature request: Multiple Buttons with one handler
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- Dominant language
- Python
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Description
I found an R workaround for handling multiple buttons with one handler in Shiny which involves some javascript. Has there been any thought to some better native support for this? If I dynamically generate a long list of action buttons, there's no native way to deal with this without writing a handler for each one, which is impossible in some situations.
Dash handles this with pattern matching callbacks and/or a way to see the details of the triggered callback. You could imagine Shiny doing something similar to this and the workaround link where any button triggers the server but then the server code can figure out which button is pressed.
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reviewing the linked JavaScript workaround and comparing it with Dash's pattern-matching callbacks and triggered-callback details. Done would mean a defined native Shiny approach for handling dynamically generated buttons through one server-side handler, including how the pressed button is identified.
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Assessment
- Tech stack
- javascript, python
- Domain
- backend-api-design
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100