using a calculated text field as a datasource for sparkline returns an error

if datasource is manipulated first via the .JS editor, the console returns this error: e[a.name].replace is not a function

an example of my .JS script:

var id = datasources["somewhere]["id"];
if(id=="howdy") {
    return(datasources["somewhere"]["data"]);
} else {
    return(-1);
}

all other freeboard widgets seem to work fine with this custom JS though.

in fact, even writing something like:

return(datasources["somewhere]["data"]);

breaks the sparkline widget

[Ultiblade]

I’m having the same issue. Also a sparkline widget cannot be saved when the js editor is used. Still no solution? Update: just noticed if you omit return and keep it simple it works…

[gigaga]

Anyone find a workaround?