Using Just Expressions on a Server or in Multiplayer
It's Client-Side Only
Just Expressions is a resource pack, so it changes only what you see. Other players will not see your animated eyes unless they also have the pack installed. Nothing needs to be added to the server, and you will not be kicked for using it on vanilla servers.
Making It Work in Multiplayer
1. Install and enable the pack in your client's resource pack list as normal.
2. Join the server. Resource packs are applied per-client, so server-side pack prompts do not block it.
3. If the server forces its own resource pack, that pack may sit above yours and override the player model. In that case, open your resource pack screen after joining and move Just Expressions above the server pack, then reload with F3 + T.
4. Remember the effect is visible only in third person — press F5 to check.
Seeing It on Other Players
You will only see animated eyes on another player if that player's skin uses a standard eye layout and your pack is active. Their own client settings do not affect your view. If you want a group to share the look, every member needs the pack enabled locally; there is no server-side switch for it.