Vue3 组合函数拖拽

代码

export function useDragMouse(dom, container) {
  let containerX = 0;
  let containerY = 0;
  let startX = 0;
  let startY = 0;
  function dragPage(e) {
    container.value.style.left = e.pageX - startX + containerX + "px";
    container.value.style.top = e.pageY - startY + containerY + "px";
  }
  dom.value.addEventListener("mousedown", (event) => {
    container.value.style.opacity = 0.8;
    startX = event.pageX;
    startY = event.pageY;
    containerX = container.value.offsetLeft;
    containerY = container.value.offsetTop;
    window.addEventListener("mousemove", dragPage);
  });
  window.addEventListener("mouseup", () => {
    if (!container.value) {
      window.removeEventListener("mousemove", dragPage);
      return;
    }
    container.value.style.opacity = 1;
    window.removeEventListener("mousemove", dragPage);
  });
}