GetNumBuffs

Official signature

GetNumBuffs(string unitTag)

Returns: integer numBuffs

Real usage — from Action Duration Reminder

        -- search player stack buff effects and save them in the newly saved action
        local numBuffs = GetNumBuffs('player') -- #number
        for i = 1, numBuffs do

Short excerpt from the shipping addon Action Duration Reminder — its ESOUI page; the code belongs to its author. Shown because documentation without a working example is half a reference.

Most-downloaded addons using it