vue自定义指令( 复制、拖动、权限)

/** * v-dialogDrag 弹窗拖拽 * Copyright (c) 2019 ruoyi */ export default { bind(el, binding, vnode, oldVnode) { const value = binding.value if (value == false) return // 获取拖拽内容头部 const dialogHeaderEl = el.querySelector('.el-dialog__header'); const dragDom = el.querySelector('.el-dialog'); dialogHeaderEl.style.cursor = 'move'; // 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null); const sty = dragDom.currentStyle || window.getComputedStyle(dragDom, null); dragDom.style.position = 'absolute'; dragDom.style.marginTop = 0; let width = dragDom.style.width; if (width.includes('%')) { width = +document.body.clientWidth * (+width.replace(/\%/g, '') / 100); } else { width = +width.replace(/\px/g, ''); } dragDom.style.left = `${(document.body.clientWidth - width) / 2}px`; // 鼠标按下事件 dialogHeaderEl.onmousedown = (e) => { // 鼠标按下，计算当前元素距离可视区的距离 (鼠标点击位置距离可视窗口的距离) const disX = e.clientX - dialogHeaderEl.offsetLeft; const disY = e.clientY - dialogHeaderEl.offsetTop; // 获取到的值带px 正则匹配替换 let styL, styT; // 注意在ie中 第一次获取到的值为组件自带50% 移动之后赋值为px if (sty.left.includes('%')) { styL = +document.body.clientWidth * (+sty.left.replace(/\%/g, '') / 100); styT = +document.body.clientHeight * (+sty.top.replace(/\%/g, '') / 100); } else { styL = +sty.left.replace(/\px/g, ''); styT = +sty.top.replace(/\px/g, ''); }; // 鼠标拖拽事件 document.onmousemove = function (e) { // 通过事件委托，计算移动的距离 （开始拖拽至结束拖拽的距离） const l = e.clientX - disX; const t = e.clientY - disY; let finallyL = l + styL let finallyT = t + styT // 移动当前元素 dragDom.style.left = `${finallyL}px`; dragDom.style.top = `${finallyT}px`; }; document.onmouseup = function (e) { document.onmousemove = null; document.onmouseup = null; }; } } };