youzanyun-devtool-worker/assets/utils/iframe-event.js

var active = false;

document.addEventListener('mousemove', function(event) {
  active = true;
  window.top.postMessage({
    command: 'iframe-mource-move',
    data: {
      clientX: event.clientX,
      clientY: event.clientY,
    }
  },'*');
});

document.addEventListener('mouseup', function() {
  if (active) {
    window.top.postMessage({
      command: 'iframe-mource-up',
      data: false
    },'*');
  }
});