domResizeCallback.js

const resizeObserver = new ResizeObserver(entries => {
  for (let entry of entries) {
    entry.target.style.borderRadius = Math.max(0, 250 - entry.contentRect.width) + 'px';
  }
  console.log('resized')
});
resizeObserver.observe($('#jquery-div')[0]);
resizeObserver.observe($(document.getElementById('raw-div'))[0]);

1. https://libin1991.github.io/2019/01/01/JS%E7%9B%91%E5%90%ACdiv%E5%85%83%E7%B4%A0%E7%9A%84resize/
2. https://developer.mozilla.org/zh-CN/docs/Web/API/ResizeObserver/observe