Vue3使用ResizeObserver监听元素的尺寸宽度变化

const resizeObserver = new ResizeObserver(entries => {
  entries.forEach(entry => {
    const { width, height } = entry.contentRect;
    console.log(`Element resized: Width=${width}, Height=${height}`);
  });
});

// 假设你想观察的元素是一个具有特定ID的div
const observedElement = document.querySelector('#yourDivId');

// 开始观察该元素
resizeObserver.observe(observedElement);

// 当需要停止观察时，可以调用 disconnect 方法
// resizeObserver.disconnect();

const container = ref(null);
let observer;
let resizeTimer;

onMounted(() => {
  createObserver();
});

onUnmounted(() => {
  if (observer) {
    observer.disconnect();
  }
});

function createObserver() {
  observer = new ResizeObserver((entries) => {
    clearTimeout(resizeTimer);
    resizeTimer = setTimeout(() => {
      for (const entry of entries) {
        const { width, height } = entry.contentRect;
        console.log(width);
      }
    }, 200);
  });

  observer.observe(container.value);
}

<div ref="container"></div>