mirror of
https://github.com/centau/vide.git
synced 2026-08-20 14:41:37 +00:00
51 lines
1.6 KiB
Markdown
51 lines
1.6 KiB
Markdown
# Cleanup
|
|
|
|
Sometimes you may need to do some cleanup when destroying a component or after
|
|
a side-effect from a source update. Vide provides a function `cleanup()` which
|
|
is used to queue a cleanup callback for the next time a reactive scope is rerun
|
|
or destroyed.
|
|
|
|
```lua
|
|
local mount = vide.mount
|
|
local source = vide.source
|
|
local cleanup = vide.cleanup
|
|
|
|
local function Timer()
|
|
local count = source(0)
|
|
|
|
local con = game:GetService("RunService").Heartbeat:Connect(function(dt)
|
|
count(count() + dt)
|
|
end)
|
|
|
|
cleanup(function()
|
|
con:Disconnect()
|
|
end)
|
|
|
|
return create "TextButton" {
|
|
Position = UDim2.fromOffset(300, 300),
|
|
Size = UDim2.fromOffset(200, 50),
|
|
|
|
Text = function()
|
|
return "seconds: " .. math.floor(count())
|
|
end,
|
|
}
|
|
end
|
|
|
|
local unmount = mount(Timer)
|
|
|
|
unmount() -- all queued cleanups are ran, heartbeat connection disconnected
|
|
```
|
|
|
|
In the above example, this allows us to disconnect the heartbeat connection
|
|
when the reactive scope responsible for creating the timer component is
|
|
destroyed, such as when it is unmounted.
|
|
|
|
::: tip
|
|
Roblox instances do not need to be explicitly destroyed for their
|
|
memory to be freed, they only need to be parented to `nil`. So there is no
|
|
need to use `cleanup()` to destroy instances. However, be wary of connecting
|
|
a function that references an instance to an event from the same instance,
|
|
this causes the instance to reference itself and never be freed. In such a case
|
|
you would need to use `cleanup()` to disconnect this connection or to explicitly
|
|
destroy the instance.
|
|
:::
|