The component allows easily, while staying in A-Frame scene definition (plain HTML file), to add a multi-user features onto A-Frame entities in scene. Create Croquet (aka Croquet V) simulations on A-Frame entities.
A-Frame multi-user component works by synchronizing / replicating entities and their components to connected peers using Croquet application architecture. It relies on public Croquet reflectors, which are avaliable online on the Internet.

Source code on GitHub

Live basic project at Glitch:

Demo video

Getting Started

How to share an entity in an A-Frame scene with other users:

Add links to this component and croquet lib in the html header

<script src=""></script>
<script src=""></script>

Add croquet component to the root element and give a name to the Croquet session

<a-scene croquet="sessionName: demo-scene">

Give an id to the entity (if not exist) and finally add multiuser component

 <a-box id="box1" position="-1.5 1 -3" rotation="0 45 0" color="#4CC3D9" multiuser></a-box>

Open the same scene in several Web Browsers windows. The entity should be synced!

How to try out the synchronization:

Open Web Browser Developer Tools and select an entity with multiuser component

let box = document.querySelector('a-scene').querySelector('#box1')

Change entity attributes like, position, rotation, geometry or material etc., by replicating the entity properties

box.setAttribute('position', {x:0, y: 1, z: -4});
box.setAttribute('rotation', {x:0, y: 45, z: 0});
box.setAttribute('material', {color: '#4BAC41'});
box.setAttribute('geometry', {width: 3});

Start a Croquet application attached to an entity, by replicating a computation (animation example)

box.setAttribute('multiuser', {anim: true});

Also you could try to attach to scene the A-Frame scene Inspector by pressing <ctrl> + <alt> + i. Modify entity properties within it's GUI and observe how some of the properties replicates on other peers.

Basic Scene Example

source code

  <title>A-Frame & Croquet</title>
  <script src=""></script>
  <script src=""></script>
  <script src=""></script>
  <a-scene croquet="sessionName: demo-scene">
    <a-box id="box1" position="-1.5 1 -3" rotation="0 45 0" color="#4CC3D9" multiuser="anim: true"></a-box>
    <a-sphere id="sphere1" position="0 1.25 -5" radius="1.25" color="#EF2D5E" multiuser></a-sphere>
    <a-cylinder id="cylinder1" position="1 0.75 -3" radius="0.5" height="1.5" color="#FFC65D"></a-cylinder>
    <a-plane id="plane1" position="0 0 -4" rotation="-90 0 0" width="4" height="4" color="#7BC8A4" multiuser></a-plane>
    <a-sky color="#ECECEC"></a-sky>