add story for fallback component

priv/storybook/components/fallback.story.exs

@@ -0,0 +1,62 @@
+defmodule Storybook.Components.Fallback do
+  use PhoenixStorybook.Story, :component
+
+  def function, do: &Doggo.fallback/1
+
+  def variations do
+    [
+      %VariationGroup{
+        id: :default,
+        variations: [
+          %Variation{
+            id: :with_value,
+            attributes: %{value: "George"}
+          },
+          %Variation{
+            id: :with_nil,
+            attributes: %{value: nil}
+          }
+        ]
+      },
+      %VariationGroup{
+        id: :with_formatter,
+        variations: [
+          %Variation{
+            id: :with_value,
+            attributes: %{
+              value: ~U[2032-06-02 08:20:04Z],
+              formatter: &DateTime.to_unix/1
+            }
+          },
+          %Variation{
+            id: :with_nil,
+            attributes: %{
+              value: nil,
+              formatter: &DateTime.to_unix/1}
+          }
+        ]
+      },
+      %VariationGroup{
+        id: :with_custom_texts,
+        variations: [
+          %Variation{
+            id: :with_value,
+            attributes: %{
+              value: "Mary",
+              placeholder: "n/a",
+              accessibility_text: "not available"
+            }
+          },
+          %Variation{
+            id: :with_nil,
+            attributes: %{
+              value: "",
+              placeholder: "n/a",
+              accessibility_text: "not available"
+            }
+          }
+        ]
+      }
+    ]
+  end
+end