v-dialog-out 弹窗可拖拽

使用

 <el-dialog
    width="1300px"
    append-to-body
    v-dialog-out
    :title="'title'"
    :visible.sync="dialogVisible"
    :close-on-click-modal="false"
></el-dialog>

源码

export default {
    bind: function (el, binding, vnode) {
        const dialogHeaderEl = el.querySelector(".el-dialog__header");
        const dragDom = el.querySelector(".el-dialog");
        dialogHeaderEl.style.cssText += ";cursor:move;";
        dragDom.style.cssText += ";top:0px;";

        // 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
        const getStyle = (function () {
            if (window.document.currentStyle) {
                return (dom, attr) => dom.currentStyle[attr];
            } else {
                return (dom, attr) => getComputedStyle(dom, false)[attr];
            }
        })();

        dialogHeaderEl.onmousedown = (e) => {
            // 鼠标按下，计算当前元素距离可视区的距离
            const disX = e.clientX - dialogHeaderEl.offsetLeft;
            const disY = e.clientY - dialogHeaderEl.offsetTop;

            const dragDomWidth = dragDom.offsetWidth;
            const dragDomheight = dragDom.offsetHeight;

            const screenWidth = document.body.clientWidth;
            const screenHeight = document.body.clientHeight;

            const minDragDomLeft = dragDom.offsetLeft;
            const maxDragDomLeft = screenWidth - dragDom.offsetLeft - dragDomWidth;

            const minDragDomTop = dragDom.offsetTop;
            const maxDragDomTop = screenHeight - dragDom.offsetTop - dragDomheight;

            // 获取到的值带px 正则匹配替换
            let styL = getStyle(dragDom, "left");
            let styT = getStyle(dragDom, "top");

            if (styL.includes("%")) {
                styL = +document.body.clientWidth * (+styL.replace(/%/g, "") / 100);
                styT = +document.body.clientHeight * (+styT.replace(/%/g, "") / 100);
            } else {
                styL = +styL.replace(/\px/g, "");
                styT = +styT.replace(/\px/g, "");
            }

            document.onmousemove = function (e) {
                // 通过事件委托，计算移动的距离
                let left = e.clientX - disX;
                let top = e.clientY - disY;

                // 边界处理
                if (-left > minDragDomLeft) {
                    left = -minDragDomLeft;
                } else if (left > maxDragDomLeft) {
                    left = maxDragDomLeft;
                }

                if (-top > minDragDomTop) {
                    top = -minDragDomTop;
                } else if (top > maxDragDomTop) {
                    top = maxDragDomTop;
                }

                // 移动当前元素
                dragDom.style.cssText += `;left:${left + styL}px;top:${top + styT}px;`;

                // emit onDrag event
                vnode && vnode.child.$emit("dragDialog");
            };

            document.onmouseup = function () {
                document.onmousemove = null;
                document.onmouseup = null;
            };
        };
    },
};