问使其在用户尝试调整图像大小时图像不会移动

EN

var drag = true;

// makes any image resizable on the page
$(function() {
  $("img").resizable();
});

//  Make the DIV element draggable
// Simple loop that goes through all element ids that start with 'dragId'
// (This needs to be the naming convention or this won't work)
var dragPrefix = 'dragId';
var el;
for (i = 0; el = document.getElementById(dragPrefix + i); i++) {
  dragElement(el);
}

function dragElement(elmnt) {
  var pos1 = 0,
    pos2 = 0,
    pos3 = 0,
    pos4 = 0;
  if (document.getElementById(elmnt.id)) {
    // if present, the header is where you move the DIV from:
    document.getElementById(elmnt.id).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;
    getToTop();
  }

  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";
    elmnt.style.opacity = "0.5"
    getToTop();
  }

  function closeDragElement() {
    // stop moving when mouse button is released:
    document.onmouseup = null;
    document.onmousemove = null;
    elmnt.style.opacity = "1.0";
    getToTop();
  }

  // Simple function that makes all other drag elements 1 and the one in 'focus' 5 which will make it
  // hover over the other elements
  function getToTop() {
    for (i = 0; el = document.getElementById(dragPrefix + i); i++) {
      el.style.zIndex = "1";
    }
    elmnt.style.zIndex = "5"
  }
}

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

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

<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>