vue3自定义dialog、modal组件的方法

import { createApp } from 'vue'
import App from './App.vue'
 
// 引入Element-Plus组件库
import ElementPlus from 'element-plus'
import 'element-plus/lib/theme-chalk/index.css'
 
// 引入弹窗组件v3layer
import V3Layer from './components/v3layer'
 
createApp(App).use(ElementPlus).use(V3Layer).mount('#app')

<v3-layer 
 v-model="showAlert"
 title="标题信息"
 content="<div style='color:#f57b16;padding:30px;'>这里是内容信息！</div>"
 z-index="2030"
 lockScroll="false"
 xclose
 resize
 dragOut
 :btns="[
  {text: '取消', click: () => showAlert=false},
  {text: '确认', style: 'color:#f90;', click: handleConfirm},
 ]"
/>
 <template #content>自定义插槽内容信息！</template>
</v3-layer>

let $el = v3layer({
 title: '标题信息',
 content: '<div style='color:#ff5252;padding:50px;'>这里是内容信息！</div>', 
 shadeClose: false,
 zIndex: 2030,
 lockScroll: false,
 xclose: true,
 resize: true,
 dragOut: true,
 btns: [
  {text: '取消', click: () => { $el.close() }},
  {text: '确认', click: () => handleConfirm},
 ]
});

|props参数|
v-model   是否显示弹框
id    弹窗唯一标识
title   标题
content   内容（支持String、带标签内容、自定义插槽内容）***如果content内容比较复杂，推荐使用标签式写法
type   弹框类型（toast|footer|actionsheet|actionsheetPicker|android|ios|contextmenu|drawer|iframe）
layerStyle  自定义弹窗样式
icon   toast图标（loading | success | fail）
shade   是否显示遮罩层
shadeClose  是否点击遮罩时关闭弹窗
lockScroll  是否弹窗出现时将body滚动锁定
opacity   遮罩层透明度
xclose   是否显示关闭图标
xposition  关闭图标位置（left | right | top | bottom）
xcolor   关闭图标颜色
anim   弹窗动画（scaleIn | fadeIn | footer | fadeInUp | fadeInDown | fadeInLeft | fadeInRight）
position  弹出位置（auto | ['100px','50px'] | t | r | b | l | lt | rt | lb | rb）
drawer   抽屉弹窗（top | right | bottom | left）
follow   跟随元素定位弹窗（支持元素.kk #kk 或 [e.clientX, e.clientY]）
time   弹窗自动关闭秒数（1、2、3）
zIndex   弹窗层叠（默认8080）
teleport  指定挂载节点（默认是挂载组件标签位置，可通过teleport自定义挂载位置） teleport="body | #xxx | .xxx"
topmost   置顶当前窗口（默认false）
area   弹窗宽高（默认auto）设置宽度area: '300px' 设置高度area:['', '200px'] 设置宽高area:['350px', '150px']
maxWidth  弹窗最大宽度（只有当area:'auto'时，maxWidth的设定才有效）
maximize  是否显示最大化按钮（默认false）
fullscreen  全屏弹窗（默认false）
fixed   弹窗是否固定
drag   拖拽元素（可定义选择器drag:'.xxx' | 禁止拖拽drag:false）
dragOut   是否允许拖拽到窗口外（默认false）
lockAxis  限制拖拽方向可选: v 垂直、h 水平，默认不限制
resize   是否允许拉伸尺寸（默认false）
btns   弹窗按钮（参数：text|style|disabled|click）
++++++++++++++++++++++++++++++++++++++++++++++
|emit事件触发|
success   层弹出后回调（@success="xxx"）
end    层销毁后回调（@end="xxx"）
++++++++++++++++++++++++++++++++++++++++++++++
|event事件|
onSuccess  层打开回调事件
onEnd   层关闭回调事件

<template>
 <div ref="elRef" v-show="opened" class="vui__layer" :class="{'vui__layer-closed': closeCls}" :id="id">
  <!-- //蒙版 -->
  <div v-if="JSON.parse(shade)" class="vlayer__overlay" @click="shadeClicked" :style="{opacity}"></div>
  <div class="vlayer__wrap" :class="['anim-'+anim, type&&'popui__'+type, tipArrow]" :style="[layerStyle]">
   <div v-if="title" class="vlayer__wrap-tit" v-html="title"></div>
   <div v-if="type=='toast'&&icon" class="vlayer__toast-icon" :class="['vlayer__toast-'+icon]" v-html="toastIcon[icon]"></div>
   <div class="vlayer__wrap-cntbox">
    <!-- 判断插槽是否存在 -->
    <template v-if="$slots.content">
     <div class="vlayer__wrap-cnt"><slot name="content" /></div>
    </template>
    <template v-else>
     <template v-if="content">
      <iframe v-if="type=='iframe'" scrolling="auto" allowtransparency="true" frameborder="0" :src="content"></iframe>
      <!-- message|notify|popover -->
      <div v-else-if="type=='message' || type=='notify' || type=='popover'" class="vlayer__wrap-cnt">
       <i v-if="icon" class="vlayer-msg__icon" :class="icon" v-html="messageIcon[icon]"></i>
       <div class="vlayer-msg__group"><div v-if="title" class="vlayer-msg__title" v-html="title"></div><div v-html="content"></div></div>
      </div>
      <div v-else class="vlayer__wrap-cnt" v-html="content"></div>
     </template>
    </template>
    <slot />
   </div>
   <div v-if="btns" class="vlayer__wrap-btns">
    <span v-for="(btn,index) in btns" :key="index" class="btn" :style="btn.style" @click="btnClicked($event,index)" v-html="btn.text"></span>
   </div>
   <span v-if="xclose" class="vlayer__xclose" :class="!maximize&&xposition" :style="{'color': xcolor}" @click="close"></span>
   <span v-if="maximize" class="vlayer__maximize" @click="maximizeClicked($event)"></span>
   <span v-if="resize" class="vlayer__resize"></span>
  </div>
  <!-- 优化拖拽卡顿 -->
  <div class="vlayer__dragfix"></div>
 </div>
</template>
 
/**
 * @Desc  Vue3.0桌面端弹窗组件V3Layer
 * @Time  andy by 2021-1
 * @About Q：282310962 wx：xy190310
 */
<script>
 import { onMounted, onUnmounted, ref, reactive, watch, toRefs, nextTick } from 'vue'
 import domUtils from './utils/dom.js'
 // 索引，蒙层控制，定时器
 let $index = 0, $locknum = 0, $timer = {}, $closeTimer = null
 export default {
  props: {
   // ...
  },
  emits: [
   'update:modelValue'
  ],
  setup(props, context) {
   const elRef = ref(null);
 
   const data = reactive({
    opened: false,
    closeCls: '',
    toastIcon: {
     // ...
    },
    messageIcon: {
     // ...
    },
    vlayerOpts: {},
    tipArrow: null,
   })
 
   onMounted(() => {
    if(props.modelValue) {
     open();
    }
    window.addEventListener('resize', autopos, false);
   })
 
   onUnmounted(() => {
    window.removeEventListener('resize', autopos, false);
    clearTimeout($closeTimer);
   })
 
   // 监听弹层v-model
   watch(() => props.modelValue, (val) => {
    // console.log('V3Layer is now [%s]', val ? 'show' : 'hide')
    if(val) {
     open();
    }else {
     close();
    }
   })
 
   // 打开弹窗
   const open = () => {
    if(data.opened) return;
    data.opened = true;
    typeof props.onSuccess === 'function' && props.onSuccess();
 
    const dom = elRef.value;
    // 弹层挂载位置
    if(props.teleport) {
     nextTick(() => {
      let teleportNode = document.querySelector(props.teleport);
      teleportNode.appendChild(dom);
 
      auto();
     })
    }
 
    callback();
   }
 
   // 关闭弹窗
   const close = () => {
    if(!data.opened) return;
 
    let dom = elRef.value;
    let vlayero = dom.querySelector('.vlayer__wrap');
    let ocnt = dom.querySelector('.vlayer__wrap-cntbox');
    let omax = dom.querySelector('.vlayer__maximize');
 
    data.closeCls = true;
    clearTimeout($closeTimer);
    $closeTimer = setTimeout(() => {
     data.opened = false;
     data.closeCls = false;
     if(data.vlayerOpts.lockScroll) {
      $locknum--;
      if(!$locknum) {
       document.body.style.paddingRight = '';
       document.body.classList.remove('vui__body-hidden');
      }
     }
     if(props.time) {
      $index--;
     }
     // 清除弹窗样式
     vlayero.style.width = vlayero.style.height = vlayero.style.top = vlayero.style.left = '';
     ocnt.style.height = '';
     omax && omax.classList.contains('maximized') && omax.classList.remove('maximized');
     
     data.vlayerOpts.isBodyOverflow && (document.body.style.overflow = '');
 
     context.emit('update:modelValue', false);
     typeof props.onEnd === 'function' && props.onEnd();
    }, 200)
   }
 
   // 弹窗位置
   const auto = () => {
    // ...
 
    autopos();
 
    // 全屏弹窗
    if(props.fullscreen) {
     full();
    }
 
    // 弹窗拖动|缩放
    move();
   }
 
   const autopos = () => {
    if(!data.opened) return;
    let oL, oT
    let pos = props.position;
    let isFixed = JSON.parse(props.fixed);
    let dom = elRef.value;
    let vlayero = dom.querySelector('.vlayer__wrap');
 
    if(!isFixed || props.follow) {
     vlayero.style.position = 'absolute';
    }
    
    let area = [domUtils.client('width'), domUtils.client('height'), vlayero.offsetWidth, vlayero.offsetHeight]
    
    oL = (area[0] - area[2]) / 2;
    oT = (area[1] - area[3]) / 2;
 
    if(props.follow) {
     offset();
    }else {
     typeof pos === 'object' ? (
      oL = parseFloat(pos[0]) || 0, oT = parseFloat(pos[1]) || 0
     ) : (
      pos == 't' ? oT = 0 : 
      pos == 'r' ? oL = area[0] - area[2] : 
      pos == 'b' ? oT = area[1] - area[3] : 
      pos == 'l' ? oL = 0 : 
      pos == 'lt' ? (oL = 0, oT = 0) : 
      pos == 'rt' ? (oL = area[0] - area[2], oT = 0) : 
      pos == 'lb' ? (oL = 0, oT = area[1] - area[3]) :
      pos == 'rb' ? (oL = area[0] - area[2], oT = area[1] - area[3]) : 
      null
     )
 
     vlayero.style.left = parseFloat(isFixed ? oL : domUtils.scroll('left') + oL) + 'px';
     vlayero.style.top = parseFloat(isFixed ? oT : domUtils.scroll('top') + oT) + 'px';
    }
   }
 
   // 元素跟随定位
   const offset = () => {
    let oW, oH, pS
    let dom = elRef.value
    let vlayero = dom.querySelector('.vlayer__wrap');
 
    oW = vlayero.offsetWidth;
    oH = vlayero.offsetHeight;
    pS = domUtils.getFollowRect(props.follow, oW, oH);
    data.tipArrow = pS[2];
    
    vlayero.style.left = pS[0] + 'px';
    vlayero.style.top = pS[1] + 'px';
   }
 
   // 最大化弹窗
   const full = () => {
    // ...
   }
 
   // 恢复弹窗
   const restore = () => {
    let dom = elRef.value;
    let vlayero = dom.querySelector('.vlayer__wrap');
    let otit = dom.querySelector('.vlayer__wrap-tit');
    let ocnt = dom.querySelector('.vlayer__wrap-cntbox');
    let obtn = dom.querySelector('.vlayer__wrap-btns');
    let omax = dom.querySelector('.vlayer__maximize');
 
    let t = otit ? otit.offsetHeight : 0
    let b = obtn ? obtn.offsetHeight : 0
 
    if(!data.vlayerOpts.lockScroll) {
     data.vlayerOpts.isBodyOverflow = false;
     document.body.style.overflow = '';
    }
    
    props.maximize && omax.classList.remove('maximized')
    
    vlayero.style.left = parseFloat(data.vlayerOpts.rect[0]) + 'px';
    vlayero.style.top = parseFloat(data.vlayerOpts.rect[1]) + 'px';
    vlayero.style.width = parseFloat(data.vlayerOpts.rect[2]) + 'px';
    vlayero.style.height = parseFloat(data.vlayerOpts.rect[3]) + 'px';
   }
 
   // 拖动|缩放弹窗
   const move = () => {
    // ...
   }
 
   // 事件处理
   const callback = () => {
    // 倒计时关闭
    if(props.time) {
     $index++
     // 防止重复点击
     if($timer[$index] !== null) clearTimeout($timer[$index])
     $timer[$index] = setTimeout(() => {
      close();
     }, parseInt(props.time) * 1000)
    }
   }
 
   // 点击最大化按钮
   const maximizeClicked = (e) => {
    let o = e.target
    if(o.classList.contains('maximized')) {
     // 恢复
     restore();
    } else {
     // 最大化
     full();
    }
   }
   // 点击遮罩层
   const shadeClicked = () => {
    if(JSON.parse(props.shadeClose)) {
     close();
    }
   }
   // 按钮事件
   const btnClicked = (e, index) => {
    let btn = props.btns[index]
    if(!btn.disabled) {
     typeof btn.click === 'function' && btn.click(e)
    }
   }
   
   return {
    ...toRefs(data),
    elRef,
    close,
    maximizeClicked,
    shadeClicked,
    btnClicked,
   }
  }
 }
</script>