FILTER FUNCTION in pluging TIME RULER

What I’m trying to do

I’m trying to define the “filter function” parameter for the “TIME RULER” plugin to only retrieve tasks that don’t have any tags

Things I have tried

(task) => return !task.tags (task.tags.length === 0)

try
(tasks) => tasks.where(task => task.tags.length===0)

Merci beaucoup. désolé pour le délais de réponse les vacances oblige…