collectValues

returns an array of unique values of the specified column

function collectValues(
    // the column id
    id: id,
    // the configuration object (details below)
    mode?: WebixDatatableCollectValuesConfig
): array

Returns

array an array of unique values

Details

If you want the filter options to be collected from the column values and not from the column options/collection, you can pass the mode parameter with visible:true:

datagrid.collectValues("columnId", { visible:true });