前言
很多时候我们写的方法是通用的,这个时候根据使用场景可以选择放在js或者ts文件并让其他文件引入使用,但如果是对现有组件添加新功能的话,还是建议用自定义指令更方便。
设置v-draggin来操作dom元素的拖拽
1. 在main.js 全局添加自定义指令
const app = createApp(App) app.directive('dragging',{ mounted(el, binding, vnode) { // console.log(el, binding, vnode); el.addEventListener('mousedown', (e:any) => { // console.log(e); let ol = e.clientX - el.offsetLeft; let ot = e.clientY - el.offsetTop; // 给document绑定一个onmousemove事件 document.onmousemove = function(e2:any) { e2 = e2 || window.event; let left = e2.clientX - ol; let top = e2.clientY - ot; //修改el的位置 el.style.left = left + "px"; el.style.top = top + "px"; }; document.onmouseup = function() { document.onmousemove = null; document.onmouseup = null; }; }) } });
2. 在需要使用拖拽功能的dom元素上添加v-dragging
<div id="imgId" width="125" height="125" v-dragging ></div> <img alt="Vue logo" class="logo" src="@/assets/logo.svg" width="125" height="125" v-dragging />
如果需要在UI组件例如ant vue这样的使用,则需要修改代码
main.ts :
const app = createApp(App) app.directive('dragging',{ mounted(el, binding, vnode) { // console.log(el, binding, vnode); el = el.parentNode.parentElement; //定位到父级元素 el.addEventListener('mousedown', (e:any) => { // console.log(e); let ol = e.clientX - el.offsetLeft; let ot = e.clientY - el.offsetTop; // 给document绑定一个onmousemove事件 document.onmousemove = function(e2:any) { e2 = e2 || window.event; let left = e2.clientX - ol; let top = e2.clientY - ot; //修改el的位置 el.style.left = left + "px"; el.style.top = top + "px"; }; document.onmouseup = function() { document.onmousemove = null; document.onmouseup = null; }; }) } });
页面内:
<a-button type="primary" @click="showModal">Open Modal {{ visible }} </a-button> <a-modal v-model:visible="visible" title="Basic Modal" @ok="handleOk" > <p v-dragging>Some contents...</p> <p>Some contents...</p> <p>Some contents...</p> </a-modal>
效果图: