Collapse Sidebar


Calling this method will fire the BindablEvent/Event event.

This function does not yield, even if no script has connected to the “Event” event and even if a connected function yields.

Parameter Limitations

Any type of Roblox object such as an Enumeration, Instance, or userdata can be passed as a parameter when a RemoteEvent is fired or a RemoteFunction invoked. Lua types such as numbers, strings, and booleans can also be passed, although there are some limitations on how data can be passed.

Mixed Tables

If a Table is passed as an argument to a BindableFunction it must be an array without missing entries or have string keys, not a mixture, or else the string keys will be lost.

Avoid passing a mixed table (some values indexed by number and others by key), as only the data indexed by number will be passed. For example, when the server receives the colorData table illustrated below, it will only see indices 1 and 2 containing "Blue" and "Yellow" while the other data will be lost in the transfer. Note, however, that sub-tables do not need to be indexed in the same way as their parent — in other words, as long as each individual sub-table is indexed with the same type, all of the data will be preserved.

Non-String Indices

If any indices of a passed table are non-string type (Instance, userdata, function, another table, etc.), those indices will be converted to a string.

-- Mixed table
local colorData = {}
colorData[1] = "Blue"
colorData[2] = "Yellow"
colorData["Color1"] = "Green"
colorData["Color2"] = "Red"

-- Table with two key-indexed sub-tables
local playerData = {}
playerData["CharData"] = {
	-- All children indexed by key
	CharName = "Diva Dragonslayer",
	CharClass = "Knight"
playerData["Inventory"] = {
	-- All children numerically indexed


Functions passed as parameters will not be replicated, therefore making it impossible to use these objects to pass functions between scripts.


Name Type Default Description


Return Type Summary

Code Samples

BindableEvent Theading Behavior

This code sample demonstrates how BindableEvents, like all Events, create threads of each connected function. Even if one errors, like ohNo does, the others continue. In addition, this sample shows how functions connected to the event can yield without blocking the thread that fired the event.

Test this code by pasting it into a Script within a BindableEvent parented to the Workspace or ServerScriptService. When running it, you’ll notice the error by ohNo does not stop the script from continuing (“Let’s-a-go!”) or any other connected function from being called. count and alphabet both do their tasks at the same time.

local be = script.Parent

-- Print numbers 1 through `n`
local function count(n)
	for i = 1, n do

-- Print the first `n` letters of the alphabet
local function alphabet(n)
	for i = 0, n-1 do

-- This function errors! But it doesn't stop
-- the others from being called
local function ohNo(n)
	if n > 10 then
		error("Oh no!")


BindableEvent Valid Values

This code sample shows the kinds of values that can be sent when firing BindableEvents using Fire. Test this code by placing a Script within a BindableEvent inside the Workspace or ServerScriptService. It will raise errors on the values that cannot be fired.

local be = script.Parent

-- Define a simple function to connect
-- to the custom event
local function onEvent(...)

-- These values CAN be sent when firing BindableEvents
be:Fire()           -- nil
be:Fire(25)         -- numbers
be:Fire("hello")    -- strings
be:Fire(true)       -- booleans
be:Fire("buy", 25)  -- multiple values are OK
be:Fire{1, 2, 3}    -- tables as arrays with no gaps
                      -- note the curly braces
be:Fire{            -- tables with string keys only
	hello = "world";
	goodbye = "world";
be:Fire{            -- tables with string keys
	point = {1, 2};   -- whose values are also valid
	point2 = {3, 4};
be:Fire{            -- tables as arrays
	{1, 2, 3};        -- whose values also are valid
	{hello = "world";};

-- These are some values you CANNOT send to/from BindableFunctions
be:Fire{1, nil, 3}  -- tables as arrays cannot have nil gaps
	[{}] = "hello";   -- table keys can only be numbers OR strings
be:Fire{            -- tables keys cannot be BOTH numbers AND strings  
	[1] = "apple";
	hello = "world";