clone_hubs_room_objects.js

// see the alternative that fetch directly from the room to clone
// https://gist.github.com/Utopiah/8eb0d83e467d13994fd69c4631130561

function getObjects(){
  var myObjects = []
  for (var media of document.querySelectorAll("[media-loader]")){
    if (media.components.pinnable && media.components.pinnable.attrValue.pinned)
      myObjects.push({
        src:media.components['media-loader'].attrValue.src,
        position: media.getAttribute('position'),
        rotation: media.getAttribute('rotation'),
        scale: media.getAttribute('scale'),
      })
  }
  return myObjects
}
var savedAsJSON = getObjects()
console.log(savedAsJSON)
console.log('Use "Copy Object" then in the target room with the same scene use loadObjectsFromJSON() on it')

function loadObjectsFromJSON(objectsToLoad){
  document.querySelector('*[networked-counter]').setAttribute('networked-counter', {max: 100})
  // to raise the 20 items limit
  for (var media of objectsToLoad){
    var el = document.createElement("a-entity")
    AFRAME.scenes[0].appendChild(el)
    el.setAttribute("media-loader", { src: media.src, fitToBox: true, resolve: true })
    el.setAttribute("networked", { template: "#interactable-media" } )
    el.setAttribute('position', media.position)
    el.setAttribute('rotation', media.rotation)
    el.setAttribute('scale', media.scale)
    el.setAttribute("pinnable", {pinned: true} )
  }
  console.log('All',objectsToLoad.length,'objects loaded')
}