<div id="outer">
    Outer div
    <button id="inner">Inner Button</button>
  </div>

  const outer = document.getElementById('outer');

  outer.addEventListener('click', function (event) {
    console.log('event.target:', event.target.id);
    console.log('event.currentTarget:', event.currentTarget.id);
  });

event.target: inner
event.currentTarget: outer

const resizeObserver = new ResizeObserver(entries => {
for (const entry of entries) {
console.log('ابعاد عنصر تغییر کرده است:',entry.target);
}
});
const resizableElement = document.getElementById('resizable');
resize0bserver.observe(resizableElement);