<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>原生JS实现拖拽位置预览</title>
<style>
.box {position: absolute;border: 1px dashed black;}
#div1 {width: 100px;height: 100px;background: yellow;position: absolute;}
#div2 {width: 100px;height: 100px;background: orange;position: absolute;}
</style>
</head>
<body>
<div id="div1"></div>
<div id="div2"></div>
<script>
window.onload = function () {
var oDiv = document.getElementById('div1');
var oDiv02 = document.getElementById('div2');
var oDivJH = document.querySelectorAll('div');
console.log( oDivJH );
oDiv.onmousedown = function (ev) {
var oEvent = ev || event;
var disX = oEvent.clientX - oDiv.offsetLeft;
var disY = oEvent.clientY - oDiv.offsetTop;
//创建一个虚线框的div
var oNewDiv = document.createElement('div');
oNewDiv.className = 'box';
//减去边框的大小与原div大小重合
oNewDiv.style.width = oDiv.offsetWidth - 2 + 'px';
oNewDiv.style.height = oDiv.offsetHeight - 2 + 'px';
oNewDiv.style.left = oDiv.offsetLeft + 'px';
oNewDiv.style.top = oDiv.offsetTop + 'px';
document.body.appendChild(oNewDiv);
document.onmousemove = function (ev) {
var oEvent = ev || event;
oNewDiv.style.left = oEvent.clientX - disX + 'px';
oNewDiv.style.top = oEvent.clientY - disY + 'px';
};
document.onmouseup = function () {
document.onmousemove = null;
document.onmouseup = null;
oDiv.style.left = oNewDiv.style.left;
oDiv.style.top = oNewDiv.style.top;
//移除虚线框
document.body.removeChild(oNewDiv);
};
};
oDiv02.onmousedown = function (ev) {
var oEvent = ev || event;
var disX = oEvent.clientX - oDiv02.offsetLeft;
var disY = oEvent.clientY - oDiv02.offsetTop;
//创建一个虚线框的div
var oNewDiv = document.createElement('div02');
oNewDiv.className = 'box';
//减去边框的大小与原 div大小重合
oNewDiv.style.width = oDiv02.offsetWidth - 2 + 'px';
oNewDiv.style.height = oDiv02.offsetHeight - 2 + 'px';
oNewDiv.style.left = oDiv02.offsetLeft + 'px';
oNewDiv.style.top = oDiv02.offsetTop + 'px';
document.body.appendChild(oNewDiv);
document.onmousemove = function (ev) {
var oEvent = ev || event;
oNewDiv.style.left = oEvent.clientX - disX + 'px';
oNewDiv.style.top = oEvent.clientY - disY + 'px';
};
document.onmouseup = function () {
document.onmousemove = null;
document.onmouseup = null;
oDiv02.style.left = oNewDiv.style.left;
oDiv02.style.top = oNewDiv.style.top;
//移除虚线框
document.body.removeChild(oNewDiv);
};
};
};
</script
</body>
</html>
标签：原生,style,oEvent,拖动,px,oNewDiv,实现,var,document From： https://www.cnblogs.com/jiunie/p/17914132.html