RobloxはJavaScriptを使っている？JavaScriptとLuauを解説（2026年版）

// JavaScript Array
const players = ["Alice", "Bob", "Charlie"];
console.log(players[0]); // "Alice" - 0-indexed!

// JavaScript Object
const playerStats = {
  health: 100,
  mana: 50,
  isAlive: true
};
console.log(playerStats.health); // 100

-- Luau Array-like Table (1-indexed!)
local players = {"Alice", "Bob", "Charlie"}
print(players[1]) -- "Alice" (Important: Luau is 1-indexed!)

-- Luau Dictionary-like Table
local playerStats = {
    health = 100,
    mana = 50,
    isAlive = true
}
print(playerStats.health) -- 100

class Player {
  constructor(name) {
    this.name = name;
    this.health = 100;
  }
  
  takeDamage(amount) {
    this.health -= amount;
  }
}
const p1 = new Player("Hero");
p1.takeDamage(10);

local Player = {}
Player.__index = Player -- When a method is missing, lookup in Player table

function Player.new(name)
    local self = setmetatable({}, Player)
    self.name = name
    self.health = 100
    return self
end

function Player:TakeDamage(amount)
    self.health = self.health - amount
end

local p1 = Player.new("Hero")
p1:TakeDamage(10) -- Automatically passes self as first argument

-- Luau Task Library (Yielding)
local function loadGameData()
    print("Loading inventory...")
    task.wait(2) -- Yields this thread for 2 seconds without freezing the game
    print("Inventory loaded")
end

task.spawn(loadGameData)
print("This prints immediately without waiting!")

--!strict
type PlayerProfile = {
    name: string,
    level: number,
    inventory: {string}
}

local function levelUp(player: PlayerProfile): number
    player.level += 1
    return player.level
end

-- Server Script (ServerScriptService/RewardSystem.server.lua)
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local GiveRewardEvent = Instance.new("RemoteEvent")
GiveRewardEvent.Name = "GiveReward"
GiveRewardEvent.Parent = ReplicatedStorage

GiveRewardEvent.OnServerEvent:Connect(function(player: Player, rewardAmount: number)
    -- Crucial: Always validate client payload on the server (never trust the client)
    if typeof(rewardAmount) == "number" and rewardAmount > 0 and rewardAmount <= 500 then
        print(string.format("Awarded %d coins to %s", rewardAmount, player.Name))
    end
end)

-- Client Script (StarterPlayerScripts/RewardButton.client.lua)
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local GiveRewardEvent = ReplicatedStorage:WaitForChild("GiveReward") :: RemoteEvent

-- Trigger server action when client UI activates
local function onRequestReward()
    GiveRewardEvent:FireServer(100)
end

# Initialize a modern roblox-ts project
npm create roblox-ts game-project
cd game-project
npm install

# Start the continuous compiler watcher
npx rbxtsc -w