css 使元素随鼠标移动

ukxgm1gy 于 2023-04-08 发布在其他

关注(0)|答案(2)|浏览(89)

我现在有这个漂亮的小东西。它是我正在寻找的部分。当你试图运行代码时，按下图像并用鼠标移动它：

<!DOCTYPE html>
<html>
<style>
#mydiv {
  position: absolute;
  z-index: 9;
  background-color: #f1f1f1;
  text-align: center;
  border: 1px solid #d3d3d3;
}

#mydivheader {
  padding: 10px;
  cursor: move;
  z-index: 10;
  background-color: #2196F3;
  color: #fff;
}
</style>
<body>



<div id="mydiv">
  <div id="mydivheader"><img src="https://res.cloudinary.com/piersolutions/image/upload/v1621772508/mpvovedzx30m3gknvmwi.jpg"></div>
</div>

<script>
//Make the DIV element draggagle:
dragElement(document.getElementById("mydiv"));

function dragElement(elmnt) {
  var pos1 = 0, pos2 = 0, pos3 = 0, pos4 = 0;
  if (document.getElementById(elmnt.id + "header")) {
    /* if present, the header is where you move the DIV from:*/
    document.getElementById(elmnt.id + "header").onmousedown = dragMouseDown;
  } else {
    /* otherwise, move the DIV from anywhere inside the DIV:*/
    elmnt.onmousedown = dragMouseDown;
  }

  function dragMouseDown(e) {
    e = e || window.event;
    e.preventDefault();
    // get the mouse cursor position at startup:
    pos3 = e.clientX;
    pos4 = e.clientY;
    document.onmouseup = closeDragElement;
    // call a function whenever the cursor moves:
    document.onmousemove = elementDrag;
  }

  function elementDrag(e) {
    e = e || window.event;
    e.preventDefault();
    // calculate the new cursor position:
    pos1 = pos3 - e.clientX;
    pos2 = pos4 - e.clientY;
    pos3 = e.clientX;
    pos4 = e.clientY;
    // set the element's new position:
    elmnt.style.top = (elmnt.offsetTop - pos2) + "px";
    elmnt.style.left = (elmnt.offsetLeft - pos1) + "px";
  }

  function closeDragElement() {
    /* stop moving when mouse button is released:*/
    document.onmouseup = null;
    document.onmousemove = null;
  }
}
</script>

</body>
</html>

它工作正常，但我希望它基本上移动到我的鼠标移动的地方。所以如果我移动我的鼠标，它应该跟随我的鼠标。你可以在这里看到一个例子www.poolhouse.co在标题（只适用于桌面）。我将如何用下面的代码做到这一点？这可能吗？

css

来源：https://stackoverflow.com/questions/67906831/make-element-move-as-mouse-moves

2条答案

按热度按时间

hwamh0ep1#

您必须将mousedown更改为mouseover

//Make the DIV element draggagle:
dragElement(document.getElementById("mydiv"));

function dragElement(elmnt) {
  var pos1 = 0, pos2 = 0, pos3 = 0, pos4 = 0;
  if (document.getElementById(elmnt.id + "header")) {
    /* if present, the header is where you move the DIV from:*/
    document.getElementById(elmnt.id + "header").onmouseover = dragMouseDown;
  } else {
    /* otherwise, move the DIV from anywhere inside the DIV:*/
    elmnt.onmouseover = dragMouseDown;
  }

  function dragMouseDown(e) {
    e = e || window.event;
    e.preventDefault();
    // get the mouse cursor position at startup:
    pos3 = e.clientX;
    pos4 = e.clientY;
    document.onmouseup = closeDragElement;
    // call a function whenever the cursor moves:
    document.onmousemove = elementDrag;
  }

  function elementDrag(e) {
    e = e || window.event;
    e.preventDefault();
    // calculate the new cursor position:
    pos1 = pos3 - e.clientX;
    pos2 = pos4 - e.clientY;
    pos3 = e.clientX;
    pos4 = e.clientY;
    // set the element's new position:
    elmnt.style.top = (elmnt.offsetTop - pos2) + "px";
    elmnt.style.left = (elmnt.offsetLeft - pos1) + "px";
  }

  function closeDragElement() {
    /* stop moving when mouse button is released:*/
    document.onmouseup = null;
    document.onmousemove = null;
  }
}

#mydiv {
  position: absolute;
  z-index: 9;
  background-color: #f1f1f1;
  text-align: center;
  border: 1px solid #d3d3d3;
}

#mydivheader {
  padding: 10px;
  cursor: move;
  z-index: 10;
  background-color: #2196F3;
  color: #fff;
}

<div id="mydiv">
  <div id="mydivheader"><img src="https://res.cloudinary.com/piersolutions/image/upload/v1621772508/mpvovedzx30m3gknvmwi.jpg"></div>
</div>

Working Fiddle

赞(0）回复(0）举报 2023-04-08

wlwcrazw2#

<!DOCTYPE html>
    <html>
     <style>
      #mydiv {
        position: absolute;
        background-color: #f1f1f1;
        text-align: center;
        border: 1px solid #d3d3d3;
      }
    </style>

   <body>
    <div id="mydiv"></div>

   <script >
     let pos1 , pos2;
     const ele = document.querySelector('#mydiv');
     ele.addEventListener("mousedown", function(e){
     pos1 = e.offsetX;
     pos2 = e.offsetY;
     document.addEventListener("mousemove" , eleMove);
     document.addEventListener("mouseup", function(e){
     document.removeEventListener("mousemove" , eleMove );
   })
 })

  function eleMove(e){
  ele.style.top = (e.clientY - pos2) + "px";
  ele.style.left = (e.clientX - pos1) + "px"
 }
 </script>
  </body>
 </html>

赞(0）回复(0）举报 2023-04-08

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css 使元素随鼠标移动

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