DAX function

ISFILTERED — DAX function reference

True if a column is filtered.

Syntax

dax

ISFILTERED(<table> | <column>)

dax

ISFILTERED(Sales[Region])

→ true / false

dax

IF(ISFILTERED(Product[Category]), "Filtered view", "Unfiltered")

→ Detects whether the user has sliced by Category

ISFILTERED on a whole table is true if any column of that table is directly filtered.

dax

IF(ISFILTERED('Date'), [Total Sales], BLANK())

→ Hides the total unless some date filter is active

ISFILTERED only detects a direct filter on that column/table — it returns FALSE if the column is filtered indirectly through a relationship from another table, even though effective rows are restricted. Use ISCROSSFILTERED to catch that case too.
ISFILTERED doesn't reveal how many values are selected — a slicer with three regions selected still returns TRUE, same as one; pair with HASONEVALUE or COUNTROWS(VALUES()) if the count matters.

From Filter context