Client-Side Glowing Effect (Fabric)

I'm trying to code in a mask that, when worn, it shows all players/mobs around them using the Glow effect. I want this to be Client-Side and only visible to the user, but I can't find any client-side coding blocks. The only way I've managed to achieve it is by applying the Glowing effect to all players/mobs in a radius, but this (i assume) shows it to all players.