Slicer filtering on a list inside a table - powerbi

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