• C#
  • JS

Script language

Select your preferred scripting language. All code snippets will be displayed in this language.


class in UnityEngine

Suggest a change


Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.


Sumbission failed

For some reason your suggested change could not be submitted. Please try again in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.




The RequireComponent attribute lets automatically add required component as a dependency.

When you add a script which uses RequireComponent, the required component will automatically be added to the game object. This is useful to avoid setup errors. For example a script might require that a rigid body is always added to the same game object. Using RequireComponent this will be done automatically, thus you can never get the setup wrong.

// The GameObject requires a RigidBody component
@script RequireComponent(Rigidbody)

var rb: Rigidbody;

function Start() { rb = GetComponent.<Rigidbody>(); }

function FixedUpdate() { rb.AddForce(Vector3.up); }
using UnityEngine;

// The GameObject requires a Rigidbody component [RequireComponent (typeof (Rigidbody))] public class PlayerScript : MonoBehaviour { Rigidbody rb; void Start() { rb = GetComponent<Rigidbody>(); } void FixedUpdate() { rb.AddForce(Vector3.up); } }


RequireComponentRequire a single component.