原生js拖拽DOM节点操作
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拖拽
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
.box {
position: absolute;
width: 100px;
height: 100px;
background: red;
cursor: move;
}
</style>
</head>
<body>
<div class="box" id="drag"></div>
</body>
</html>
<script>
window.onload = function () {
var drag = document.getElementById('drag');
// //点击某物体时，用drag对象即可，move和up是全局区域，
// 也就是整个文档通用，应该使用document对象而不是drag对象(否则，采用drag对象时物体只能往右方或下方移动)
drag.onmousedown = function (event) {
var event = event || window.event; //兼容IE浏览器
// 鼠标点击物体那一刻相对于物体左侧边框的距离=点击时的位置相对于浏览器最左边的距离-物体左边框相对于浏览器最左边的距离
var diffX = event.clientX - drag.offsetLeft;
var diffY = event.clientY - drag.offsetTop;
if (typeof drag.setCapture !== 'undefined') {
drag.setCapture();
}
document.onmousemove = function (event) {
var event = event || window.event;
var moveX = event.clientX - diffX;
var moveY = event.clientY - diffY;
if (moveX < 0) {
moveX = 0
} else if (moveX > window.innerWidth - drag.offsetWidth) {
moveX = window.innerWidth - drag.offsetWidth
}
if (moveY < 0) {
moveY = 0
} else if (moveY > window.innerHeight - drag.offsetHeight) {
moveY = window.innerHeight - drag.offsetHeight
}
drag.style.left = moveX + 'px';
drag.style.top = moveY + 'px'
}
document.onmouseup = function (event) {
this.onmousemove = null;
this.onmouseup = null;
//修复低版本ie bug
if (typeof drag.releaseCapture != 'undefined') {
drag.releaseCapture();
}
}
}
}
</script>全部评论 (0)
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