Slicer filtering on a list inside a table

Question

assuming I have a table that has a list inside

+---------+--------------+
|   tag   |     val      |
+---------+--------------+
| [a,b,c] | 1            |
| [a,e]   | 2            |
| [f,g]   | 3            |
| [e,f]   | 4            |
+---------+--------------+

can I create a slicer that when selected will still filter the item inside the list of the tag column?

eg. i select on the filter "a" it will show 1 and 2. "e" will filter 2 and 4, "f" will filter 3 etc.

Answer 1

You may create a measure (returning 1/0) where you use PATHCONTAINS function. We need to remove square bracket and replace commas to pipe "|"; This measure you can put to filter pane in table/matrix visualization https://dax.guide/pathcontains/

ForFilter = 
var __selectedTag = SELECTEDVALUE(disconnected[tagList])
var __tags = SELECTEDVALUE('Table'[Tag])
var __path = SUBSTITUTE(SUBSTITUTE(SUBSTITUTE(__tags,",","|"),"[",""),"]","")
return

IF(PATHCONTAINS(__path, __selectedTag),1,0)

EDIT: version for multiple selection

var __string = CONCATENATEX( VALUES(disconnected[tagList]), disconnected[tagList],"|")
var __tags = SELECTEDVALUE('Table'[Tag])
var __path = SUBSTITUTE(SUBSTITUTE(SUBSTITUTE(__tags,",","|"),"[",""),"]","")
VAR Table0 =
    SELECTCOLUMNS(
    TOPN(1,
    SELECTCOLUMNS(
    ADDCOLUMNS (
        GENERATE (
            ROW ( "tag", __path ,"Text",__string ),
            VAR TokenCount =
                PATHLENGTH ([Text] )
            RETURN
                GENERATESERIES ( 1, TokenCount )
        ),
        "Word", PATHITEM ([Text], [Value] )
        
    ),
    "Word",IF(PATHCONTAINS([tag],[Word]),1,0),
    "Tag", [tag],
    "Values", [Value]
    ), [Word],DESC, [Values])
    ,"Bool", [Word])
    return

    Table0