js实现单元格拖拽效果
时间：2021-02-22 18:01:59|栏目：JavaScript代码|点击： 次
本文实例为大家分享了js实现单元格拖拽效果的具体代码，供大家参考，具体内容如下
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
* {
margin: 0;
padding: 0;
}
#box {
position: relative;
}
#box div {
position: absolute;
width: 100px;
height: 100px;
border-radius: 15px;
text-align: center;
line-height: 100px;
font-size: 50px;
cursor: pointer;
}
</style>
</head>
<body>
<div id="box"></div>
<script type="text/javascript">
//生成结构
var oDiv = document.getElementById("box");
var ml = mt = 10;
//行列结构
for(var i = 0; i < 3; i++) { //行
for(var j = 0; j < 3; j++) { //列
var aDiv = document.createElement("div");
oDiv.appendChild(aDiv);
aDiv.style.left = j * (aDiv.offsetWidth + ml) + "px";
aDiv.style.top = i * (aDiv.offsetHeight + mt) + "px";
//背景颜色随机
aDiv.style.backgroundColor = "rgb(" + Math.floor(Math.random() * 256) + "," + Math.floor(Math.random() * 256) + "," + Math.floor(Math.random() * 256) + ")"; //256=(256-0+1)+0;
}
}
//添加文字
var str = "ABCDEFGHI";
var aItems = oDiv.children;
for(var i = 0; i < str.length; i++) {
aItems[i].innerText = str[i];
}
//拖拽
for(var i = 0; i < aItems.length; i++) {
aItems[i].onmousedown = function(e) {
var evt = e || event;
var x = evt.offsetX;
var y = evt.offsetX;
var dragNode = this;
var cloneNode = dragNode.cloneNode();
oDiv.replaceChild(cloneNode, dragNode);
cloneNode.style.border = "1px dashed #ccc";
oDiv.appendChild(dragNode);
dragNode.style.zIndex = 1;
document.onmousemove = function(e) {
var evt = e || event;
var _left = evt.clientX - x;
var _top = evt.clientY - y;
dragNode.style.left = _left + "px";
dragNode.style.top = _top + "px";
return false; //选中,文字也会拖动 去除默认行为
}
document.onmouseup = function() {
var disArr =[];
var newArr =[];
for(var i = 0; i < aItems.length-1; i++) {
var disx = dragNode.offsetLeft - aItems[i].offsetLeft;
var disy = dragNode.offsetTop - aItems[i].offsetTop;
var dis= Math.sqrt(Math.pow(disx, 2) + Math.pow(disy, 2));
disArr.push(dis);
newArr.push(dis);
}
disArr.sort(function(a, b) {
return a - b;
});
var minval = disArr[0];
var minIndex = newArr.indexOf(minval);
dragNode.style.left = aItems[minIndex].style.left;
dragNode.style.top = aItems[minIndex].style.top;
aItems[minIndex].style.left = cloneNode.style.left;
aItems[minIndex].style.top = cloneNode.style.top;
oDiv.removeChild(cloneNode);
document.onmousemove = null;
document.onmouseup = null;
}
return false;
}
}
</script>
</body>
