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Add class_name argument to more map elements #2055

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@pixelsapphire

LeafletJS reference mentions a className option for several classes, such as Path (https://leafletjs.com/reference.html#path). The option is used to give elements custom CSS classes. It is implemented in Folium as the class_name keyword argument, but it is currently only available for DivIcon and GeoJsonPopup.
I would like to be able to give custom classes to PolyLine elements (and other BaseMultiLocation elements) via the class_name keyword argument.
Currently, I'm abusing the fill_color argument (and setting fill_opacity=0) as a place to store the classes to be later accessed and properly added by a JS script, but this solution is far from perfect, to put it mildly.

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  1. Conengmo commented on Dec 17, 2024

    @Conengmo
    Member

    This is a good point. Classes like PolyLine accept **kwargs, but then this gets stripped in the path_options function.

    I don't think we should add class_name as explicit keyword arguments, but we should allow users to pass it through **kwargs.

    We should add className as a valid option in the **kwargs of path_options. Should be easy to add and test for. PR's are welcome!

  2. added
    enhancementFeature request or idea about how to make folium better
    help wantedHelp is welcome for this issue or PR
    on Dec 17, 2024
  3. added a commit that references this issue on Jan 6, 2025
    af03218
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