Thanks for your help, it went wrong at first because a bracket was missing.) I adjusted this but unfortunately it doesn’t work. Could this be related to the fact that I have already adjusted the CSS?
{
module: "MMM-CalendarExt3",
position: "lower_third",
title: "",
config: {
eventTransformer: (ev) => {
if (ev.title.search('Uitje') > -1) ev.color = 'blue'
if (ev.title.search('Verjaardag') > -1) ev.icon = 'birthday-cake'
return ev
},
}
}