Broadcast → Fire Methods

Fire Methods

Three methods to fire events to one player, all players, or a subset. All are sent over UnreliableRemoteEvent and subject to the 900-byte payload limit.

Signatures

broadcast:Emit(player: Player, event: string, data: any)

broadcast:EmitAll(event: string, data: any)

broadcast:EmitTo(players: {Player}, event: string, data: any)

Parameters

Parameter	Type	Description
`player`	Player	Target player for `Emit`
`players`	`{Player}`	Target subset for `EmitTo`
`event`	string	Event name — matched by `listener:On(event)` on the client
`data`	any	Payload. Serialised over UnreliableRemoteEvent. Must be ≤ 900 bytes.

Usage

local broadcast = RoExpress("Broadcast")

-- To one player
broadcast:Emit(player, "hit", { dmg = 35, pos = hitPos })

-- To all players in the server
broadcast:EmitAll("explosion", { pos = blast.Position, radius = 20 })

-- To a specific subset
broadcast:EmitTo({ p1, p2, p3 }, "zoneEnter", { zoneId = 4 })

Receiving on the client

Broadcast events are received by Listener using listener:On(event, callback):

-- Server
broadcast:EmitAll("hit", { dmg = 35, pos = hit.Position })

-- Client
local listener = RoExpress("Listener")
listener:On("hit", function(data)
    spawnDamageNumber(data.pos, data.dmg)
end)

Broadcast vs Push

Feature	Broadcast	Push
Transport	UnreliableRemoteEvent	RemoteEvent
Guaranteed delivery	No	Yes
In-order delivery	No	Yes
Payload limit	900 bytes	Roblox standard
Rate limited	Yes — global TokenBucket	No (server-initiated)
Best for	Damage numbers, movement hints, visual FX	Inventory sync, round events, state changes