Creates a new `Class.Instance` of type `className`.

Note that when the `Class.Instance.Parent|Parent` of an object is set,
Luau listens to a variety of different property changes for replication,
rendering, and physics. For performance reasons, it's recommended to set
the instance's `Class.Instance.Parent|Parent` property **last** when
creating new objects, instead of specifying the second argument (`parent`)
of this constructor.

```lua
-- Set new instance's parent last (recommended)
local part = Instance.new("Part")
part.Position = Vector3.new(0, 10, 0)
part.Parent = workspace

-- Set new instance's parent in constructor (discouraged)
local part = Instance.new("Part", workspace)
part.Position = Vector3.new(0, 10, 0)
````

Instance.new

className

Class name of the new instance to create.


parent

Optional object to parent the new instance to. Not recommended for performance reasons (see description above).


Returns an `Class.Instance` of the specified class.

Creates a new object with the same type and property values as an existing
object. In most cases using `Class.Instance:Clone()` is more appropriate,
but this constructor is useful when implementing low‑level libraries or
systems.

There are two behavioral differences between this constructor and the
`Class.Instance:Clone()` method:

- This constructor will not copy any of the descendant `Class.Instance|Instances` parented to the existing object.

- This constructor will return a new object even if the existing object had `Class.Instance.Archivable` set to `false`.


Instance.fromExisting

existingInstance

The existing `Class.Instance` to copy property values from.


Returns an `Class.Instance` which is a copy of an existing
`Class.Instance`.


Instance

/reference/engine/datatypes/Instance.yaml

Data Type

An object that runs connected functions upon a specific occurrence.

RBXScriptSignal

A sequence of characters, such as letters, numbers, and symbols.

Luau

string

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This method is asynchronous and returns an `Operation`, which represents the current state of the operation. It contains an endpoint path that you can poll to obtain the real response and applicable metadata. See the [documentation]({longRunningOperationsLink}) on long-running operations for more information.
            
The following sections describe the response and metadata objects that are provided when an operation completes.

Beta endpoints are ready for public use. Breaking changes are possible but rare.

This field may be set when creating a resource, but may not be modified by subsequent requests.

This field may be provided in requests, but will never be included in responses.

Per API Key: {maxInPeriod} requests every {periodInSeconds} seconds per IP Address

This field may be set on responses, but will be ignored in requests.

The following API key permissions are required to call this endpoint. For more
information on generating proper keys, see [Managing API Keys]({apiKeyReferenceDocLink}).

The following endpoints are available at paths relative to the base URL.

This string is formatted as a [FieldMask](/cloud/reference/types#fieldmask).

A JSON value can be `null`, `boolean`, `string`, `number`, `array`, or `object`.

The following scopes are required for your OAuth 2.0 application to use this endpoint. For more information on how to register an OAuth 2.0 application, see [App Registration and Review]({oauth2ReferenceDocLink}).

The following objects describe payloads that are accepted or returned. See each individual endpoint for more information on when these objects are used.

This string is formatted as a [Timestamp](/cloud/reference/types#timestamp).

This allows viewing information about your assets.

This allows uploading and updating assets to Roblox.

Grants the ability to update badges owned by the user.

This allows viewing information about your commerce items.

This allows editing of your commerce merchant connections.

This allows you to view information about your Creator Store products.

This allows you to modify information about your Creator Store products.

This allows viewing information about your groups.

This allows you to manage group join requests for your account.

This allows viewing information about your inventory.

Grants access to mange your badges and spend robux.

Grants access to manage your developer products.

Grants access to read information about the experiences you follow.

Grants access to follow and unfollow experiences on your behalf.

Grants permission to read group information.

Grants access to read and write your localization tables

Grants access to manage team collaboration for all experiences you own.

Grants access to manage your experiences and certain information associated with your experiences (e.g. localization information).

Grants access to read your experiences' localization information.

Grants access to modify your experiences' localization preferences.

Grants access to manage your user account.

Grants access to modify user localization preferences.

This grants the ability to publish messages on behalf of users.

This allows sending notifications from your experience to users.

This allows listing secrets associated with your experience.

This allows creating and updating secrets associated with your experience.

Grants access to read about your subscription products.

Grants the ability to read place information.

Grants the ability to edit place information.

This operation grants access to publish new versions of experiences to Roblox.

Grants the ability to read experience information.

Grants the ability to edit experience information.

Allows you to view user restrictions in the experience.

Allows you to edit user restrictions in the experience.

Grants the ability to read user's premium and verified status.

This allows you to view a user's social accounts.

This enables Single Sign-On functionality.

This grants access to read your profile information.

Default Value: {defaultValueStart}{defaultValueEnd}

An array is an ordered list of values. Arrays are useful for storing collections of data.

A set of key-value pairs, where the keys can be any number, string, or object.

This function returns immediately if possible, but can yield the thread that called it until it can return a value.

{nameStart}name{nameEnd} is no longer supported or maintained by Roblox.

This math operation is no longer supported or maintained by Roblox.

This member doesn’t appear in the object browser and is not intended for widespread use.

This member is only accessible only through the command bar. Attempting to access this member from scripts causes an error.

This function can’t pause the Lua thread that called it.

Attempting to access this member in scripts causes an error. You might be able to access this member from Roblox Studio's property window.

This member doesn’t appear in Roblox Studio’s Object Browser.

You can’t create an instance of this class with the Instance.new constructor.

Roblox does not replicate this member across its server-client boundary.

Lua code can’t access this member. You might be able to change its value from the property window in Roblox Studio.

This member is accessible from OpenCloud Luau execution tasks.

This object’s replication behavior is dependent on the player who owns it.

This member is accessible through the command bar and plugins. Attempting to access this member from scripts causes an error.

This member is read only. Attempting to write to this member causes an error.

This property is read-only and is safe to read in unsynchronized threads. Attempting to write to it causes an error.

This member is accessible only in CoreScripts.

Only Roblox CoreScripts can access this member, and it isn’t usable by Players.

You can read and write to this property safely from multiple threads.

This class is a top-level singleton. Retrieve an instance of this class with the GetService function.

Multiple threads can potentially write to this property, so it’s unsafe to read from unsynchronized threads.

This function pauses the Lua thread that called it until it returns a result. This doesn’t interrupt other scripts.

Learn how to create successful content on Roblox with comprehensive guides, code samples, reference, and tutorials.


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Buildings and Props

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CFrames

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Current Release

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Custom Events

Custom Fields

Custom Particle Effects

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Customization

Customize Global Lighting

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Cylindrical

DMCA Guidelines

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Data Model

Data Stores

Data Structures

Data Types

Deadly Lava

Debugging

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Designing Dark Soundscapes

Designing Educational Experiences

Designing For Roblox

Designing Poses

Designing Your Speeder

Designing a Map

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Design the World

Detecting Hits

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Develop Polished Assets

Developer Awards

Developer Console

Developer Products

Developing a Moving World

Develop v1

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Digital Citizenship

Disabling Default UI

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Discovery

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Duplicate and Design

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Earning on Roblox

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Engagement Payouts

Engine API Reference

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Enhancing Indoor Environments

Enhancing Outdoor Environments

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Enums

Environment

Environmental Art

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Error Codes and Limits

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Event Organizers

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Event Types

Events

Events Platform

Examples

Experience Events

Experience Guidelines

Experience Icons

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Experienced Content

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Explorer Window

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Exporting Character Model

Exporting FBX

Exporting FBX from Blender

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External Catalog Queries

External Tools

Extra Head Objects

FACS Poses Reference

Fading Trap

Featured Content

Features

Final Checks

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Finish the Blast

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Foundational Gameplay Systems

Frames

Frequently Asked Questions

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Friends

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Game Join

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Gamepad

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Get Off the Ground

Get Started

Getting Featured on Roblox Owned Channels

Getting Started

Getting Started for Developers

Global Lighting

Global Wind

Globals

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Go Beyond the Challenge

Going for a Race

Go to Educator Onboarding

Greybox Your Environment

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Grids and Tables

Grouping the Parts

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Growing Your Audience

Guidelines

Handling Requests

Hash Map

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Highlighting

Hinge

Hit Detection with Lasers

Home Tab

Icons and Thumbnails

Identifying Issues

If/then Practice - Power ups

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Immersive Ads

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Implement Designs in Studio

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Importing PBR Textures

Importing into Studio

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In Studio

Input

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Inspire

Installation and Setup

Instance Attributes

Instance Streaming

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Interfaces on Parts

Intermediate Gameplay

Introduction to Scripting

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Island Terrain

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Layout Structures

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Lighting

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Name and Health Display

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Setting Up Mesh

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Skyboxes

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Sound

Sound Design

Spatial Data

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Specifications

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Spring

Stacks

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Start Coding

Story Games

Streaming

Streaming in Immersion

Strings

Studio

Studio Interface

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Tables

Tag Reference

Tag Table

Take Flight

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Texture Generator

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The Mystery of Duvall Drive

The Storm

Third-Party Analytics Services

Third-Party Software

Thumbnails

Thumbnails Resizer

Timed Bridge For Loops

Timers and Events

Tips and Settings

Today's Picks on Home

Today's Picks on Marketplace

Toolbox

Tools

Torque

TorsionSpring

Trades

Trails

Translating Dynamic Content

Translating Experience Page Information

Translating In-Experience Content

Translation Roles

Trimming Clothing Shape

Tuples

Two Step Verification

Type Checking

Type Coercion

Types

Types and Locations

UI Animation

UI Animation/Tweens

UI Drag Detectors

UI Objects

UI and UX

Unit Lessons

Universal

Upload and Publishing

Uploading and Publishing

Uploading your Asset

User Advertisements

User Interface

User Interface Design

User Interfaces

User Inventories

Userdata

Users

Using Animations

Using Heads in Studio

Using Information with Parameters

Using MicroProfiler

Using Particles for Actions

Using Particles for Explosions

Using Studio's 3D Importer

Using Textures

Using the Accessory Fitting Tool

VR Guidelines

Validation Tool

Variables

Variables & Objects

VectorForce

Verifying Attachments

Video Assets

Video Frames

View Tab

Voice Chat

Walkthrough

Weapons Kit

Webhook Notifications

Weld

Wireframe Your Layouts

Working With Translators

Working in Teams

Writing the Story

Xbox Guidelines

Instance

Summary

Constructors

Constructors

new

Parameters

fromExisting

Parameters