// === dit moet in quill script / rte.html //

var showImageUI = () => {
  var receiveMessage = ev => {
    if (source !== window || ev.data !== "addImage") {
      window.removeEventListener("message", receiveMessage);
      quill.insertEmbed(10, 'image', ev.data);
    }
  };
  window.addEventListener("message", receiveMessage);
  window.postMessage("addImage");
};

var toolbar = quill.getModule('toolbar');
toolbar.addHandler('image', showImageUI);


// ======== In React Native ======
function onMessage(ev) {
  if (ev.data === "addImage") {
    var img = promp("Select image"); //use that library
    window.postMessage(img);
  }
}

window.addEventListener("message", onMessage); // onMessage={onMessage}