JavaScript实现DIV可随意移动，无需设置监听

最新推荐文章于 2024-04-16 19:44:59 发布

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#DIV可移动

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通过JavaScript实现DIV元素的鼠标拖动功能，无需额外监听，只需调用drag函数并传入目标DIV的ID，即可轻松实现元素的任意位置移动。

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JavaScript实现DIV可随意移动，无需设置监听

每次使用时候，给drag函数传递一个DIV的id号，该DIV即可被鼠标移动

 drag:function(id) {
            var $ = function (flag) {
                return document.getElementById(flag);
            }
            $(id).onmousedown = function (e) {
                var d = document;
                var  that=this;
                var page = {
                    event: function (evt) {
                        var ev = evt || window.event;
                        return ev;
                    },
                    pageX: function (evt) {
                        var e = this.event(evt);
                        return e.pageX || (e.clientX + document.body.scrollLeft - document.body.clientLeft);
                    },
                    pageY: function (evt) {
                        var e = this.event(evt);
                        return e.pageY || (e.clientY + document.body.scrollTop - document.body.clientTop);

                    },
                    layerX: function (evt) {
                        var e = this.event(evt);
                        return e.layerX || e.offsetX;
                    },
                    layerY: function (evt) {
                        var e = this.event(evt);
                        return e.layerY || e.offsetY;
                    }
                }            
                var x = page.layerX(e);
                var y = page.layerY(e);       
                if (that.setCapture) {
                    that.setCapture();
                }
                else if (window.captureEvents) {
                    window.captureEvents(Event.MOUSEMOVE | Event.MOUSEUP);
                }
                d.onmousemove = function (e) {                   
                    var tx = page.pageX(e) - x;
                    var ty = page.pageY(e) - y;
                    that.style.left = tx + "px";
                    that.style.top = ty + "px";
                }
                d.onmouseup = function () {
                    if (that.releaseCapture) {
                        that.releaseCapture();
                    }
                    else if (window.releaseEvents) {
                        window.releaseEvents(Event.MOUSEMOVE | Event.MOUSEUP);
                    }
                    d.onmousemove = null;
                    d.onmouseup = null;
                }
            }
        }