JavaScript Basics

JavaScript is a modern alternative to Lua for FiveM scripting. FiveM runs JavaScript separately in client and server contexts. Keep shared data serializable, use runtime-specific natives only on the correct side, and avoid blocking loops so other resource callbacks continue to execute.

Variables


const name = 'John'
let age = 25
var isActive = true

Functions


function greet(name) {
  return `Hello, ${name}`
}
 
const message = greet('World')

Objects


const player = {
  name: 'John',
  age: 25,
  items: ['sword', 'shield'],
}
 
console.log(player.name) // "John"
console.log(player.items[0]) // "sword"

FiveM Functions


// Get player
const playerId = GetPlayerPed(-1)
 
// Get player coords
const coords = GetEntityCoords(playerId)
 
// Trigger event
emit('myevent', data)

Async/Await


async function fetchData() {
  const response = await fetch('https://api.example.com/data')
  const data = await response.json()
  return data
}

Common Patterns

Debouncing


let lastTime = 0
function debouncedAction() {
  const currentTime = GetGameTimer()
  if (currentTime - lastTime < 1000) {
    return
  }
  lastTime = currentTime
  // Do action
}

Threading


setTick(() => {
  // Do something every frame
})