posit-dev / posit-dev/py-shiny
Inconsistency in adding HTML attributes
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- Dominant language
- Python
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Description
https://shiny.rstudio.com/py/docs/ui-html.html says that you can add attributes like class to UI elements either by dict or by name. This works for ui.tag()s, and many if not all ui.input_*(), but it doesn't seem to work on ui.output_*():
>>> ui.output_text("myid", {"class": "myclass"})
<span id="myid" class="shiny-text-output"></span>
>>> ui.output_text("myid", class_="myclass")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: output_text() got an unexpected keyword argument 'class_'
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First steps
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Research direction
Start by reproducing the examples in the UI HTML attributes documentation and inspect the ui.output_text() entry point, comparing it with ui.tag() and ui.input_() behavior. Done means output_() elements consistently accept attributes by dictionary and by keyword, with the documented class example working without a TypeError.
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Assessment
- Tech stack
- python
- Domain
- frontend, web-dev
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 42/100