Context: If you didn’t already know, calling require() on a ModuleScript returns a cached version if require() has been called once before on that same ModuleScript, albeit locally (the server and client have separate cached versions.)
When clicking the “Play” button in studio, studio acts as both a client and server in just one window. I’m not entirely sure how separate the server and client tasks are, but Play would be a better emulation of a real server if the server and the client’s cached ModuleScripts were separated. Here’s an example to illustrate the issue.
TestModule [ReplicatedStorage]
[code]local TestModule = {}
local A = 0
TestModule.A = 0
function TestModule:Test()
A = 42
self.A = 42
end
function TestModule:GetLocalA()
return A
end
return TestModule[/code]
ServerTest [ServerScriptService]
[code]local TestModule = require(game.ReplicatedStorage.TestModule)
print(“SERVER TEST”)
print(“===========”)
print("local A = " … TestModule:GetLocalA())
print("TestModule.A = " … TestModule.A)
print(“===========”)
print(“TEST()”)
TestModule:Test()
print(“===========”)
print("local A = " … TestModule:GetLocalA())
print("TestModule.A = " … TestModule.A)
print(“===========”)[/code]
ClientTest [StarterPlayerScripts]
[code]local TestModule = require(game.ReplicatedStorage.TestModule)
print(“CLIENT TEST”)
print(“===========”)
print("local A = " … TestModule:GetLocalA())
print("TestModule.A = " … TestModule.A)
print(“===========”)
print(“TEST()”)
TestModule:Test()
print(“===========”)
print("local A = " … TestModule:GetLocalA())
print("TestModule.A = " … TestModule.A)
print(“===========”)[/code]
Here are the outputs of these two scripts.
[code]
SERVER TEST
local A = 0
TestModule.A = 0
TEST()
local A = 42
TestModule.A = 42
CLIENT TEST
local A = 42
TestModule.A = 42
TEST()
local A = 42
TestModule.A = 42
===========[/code]
As you can see, whichever script runs first (the server) calls require() on the ModuleScript, creating a cached version of the ModuleScript. Then, the client script runs, and the result from require() is the cached version of the ModuleScript. This isn’t how it works on a server, so I think that it would be best to separate the ModuleScript caches for the server and the client in Play mode.
Thanks!