Using operator: "Contains" in a slicer filter via the API

[hakada]

Hi

I am trying to set the slicers of a report via the javascript API. I have it working using basic filters, but using basic filters I have to specify the exact value for the slicer. 

Using advanced filters for page filters it is possible to set the operator to "Contains", but this does not seem to work for slicers. Does anyone know if this is possible, or does slicers only accept specific values?

My filter setting is as follows,

    const filterAdv = {

        $schema: "http://powerbi.com/product/schema#advanced",

        conditions: [

            {

                operator: "Contains", 

                value: "Den"

            }

        ],

        filterType: 0, 

        logicalOperator: "And",

        target: {

            table: setSlicer.table,

            column: setSlicer.column

        }

    };