Here's a simple function to check if the slot is empty, where empty can mean.
- No slot provided
- Slot provided but has only whitespace
CODE
defp slot_empty?(slot) do
case slot do
[] ->
true
slots when is_list(slots) ->
not Enum.any?(slots, fn slot ->
case slot do
%{inner_block: inner_block} when is_function(inner_block) ->
inner_block.(%{}, nil)
|> HTML.html_escape()
|> HTML.safe_to_string()
|> String.trim()
|> Kernel.!=("")
_ ->
false
end
end)
_ ->
true
end
end
Example usage:
CODE
slot :inner_block
@spec heading(assigns :: map()) :: Rendered.t()
def heading(assigns) do
~H"""
<header :if={not slot_empty?(@inner_block)} class="grid gap-4 pb-8 text-left">
<%= render_slot(@inner_block) %>
</header>
"""
end
Hope this helps.
Vollständiger Original-Bericht
Ausführliche Details, Code-Beispiele & Hersteller-Stellungnahme auf dev.to.
SOCIAL SHARE CARD GENERATOR