Declare UIs with Declarative API
Panel is built on Param - a library for handling all the user-modifiable parameters, arguments, and attributes that control your code. This section contains how-to guides for using Param objects and declared dependencies to generate user interfaces with Panel.
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:::{grid-item-card} {octicon}single-select;2.5em;sd-mr-1 sd-animate-grow50 Generate Widgets from Parameters 🔗 uis :link-type: doc
How to generate UIs from Parameterized classes without writing any GUI related code. :::
:::{grid-item-card} {octicon}paintbrush;2.5em;sd-mr-1 sd-animate-grow50 Declare Custom Widgets 🔗 custom :link-type: doc
How to extend Param based UIs with custom widgets. :::
:::{grid-item-card} {octicon}rss;2.5em;sd-mr-1 sd-animate-grow50 Declare Parameter dependencies 🔗 dependencies :link-type: doc
How to leverage @param.depends to express dependencies and trigger events based on UI interactions. :::
:::{grid-item-card} {octicon}stack;2.5em;sd-mr-1 sd-animate-grow50 Create nested UIs 🔗 subobjects :link-type: doc
How to structure Parameterized classes with subobjects to create nested UIs automatically. :::
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Examples
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:::{grid-item-card} Action Button :img-top: https://assets.holoviz.org/panel/how_to/param/action_button.png 🔗 examples/action_button :link-type: doc
Using param.Action to define a UI with a button. :::
:::{grid-item-card} Automatic Loading Indicator :img-top: https://assets.holoviz.org/panel/how_to/param/loading.png 🔗 examples/loading :link-type: doc
Automatically enable a loading indicator for components rendered dynamically. :::
:::{grid-item-card} Param Subobjects :img-top: https://assets.holoviz.org/panel/how_to/param/subobjects.png 🔗 examples/subobjects :link-type: doc
Using Param to express a nested UI using a hierarchy of classes. :::
:::{grid-item-card} Precedence :img-top: https://assets.holoviz.org/panel/how_to/param/precedence.png 🔗 examples/precedence :link-type: doc
Using Parameter precedence to control the visibility of components. :::
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