Vue2.x自定义桌面端弹框组件VLayer

// 在main.js中引入组件
import VLayer from './components/vlayer';
Vue.use(VLayer);

<v-layer 
    v-model="isConfirm"
    title="标题信息"
    content="<div style='color:#09f;padding:10px;'>弹窗内容信息！</div>"
    xclose
    z-index="6666"
    lockScroll="false"
    resize
    dragOut
    :btns="[
        {text: '取消', click: () => isConfirm=false},
        {text: '确定', style: 'color:#f90;', click: handleFn},
    ]"
/>

let $vlayero = this.$vlayer({
    title: '标题信息',
    content: '<div style='color:#09f;padding:10px;'>弹窗内容信息！</div>', 
    xclose: true,
    zIndex: 6666,
    lockScroll: false,
    resize: true,
    dragOut: true,
    btns: [
        {text: '取消', click: () => { $vlayero.close(); }},
        {text: '确定', click: () => this.handleFn()},
    ]
});

@@默认参数
v-model     当前组件是否显示
title       标题
content     内容（支持自定义插槽内容）
type        弹窗类型（toast | footer | actionsheet | android/ios | contextmenu | drawer | iframe | message/notify/popover）
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）
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）
resize      是否允许拉伸尺寸（默认false）
btns        弹窗按钮（参数：text|style|disabled|click）
------------------------------------------
@@组件式事件
open        打开弹出层时触发（@open="xxx"）
close       关闭弹出层时触发（@close="xxx"）
------------------------------------------
@@函数式事件
onOpen      打开弹窗回调
onClose     关闭弹窗回调

<template>
  <div v-show="opened" class="vui__layer" :class="{'vui__layer-closed': closeCls}" :id="vlayerId">
    <!-- //遮罩 -->
    <div v-if="JSON.parse(shade)" class="vlayer__overlay" @click="shadeClicked" :style="{opacity}"></div>
    <!-- //窗体 -->
    <div class="vlayer__wrap" :class="['anim-'+anim, type&&'popui__'+type, drawer&&'popui__drawer-'+drawer, xclose&&'vlayer-closable', 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">
        <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 class="vlayer-msg__content" 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" :class="{'btn-disabled': btn.disabled}" :style="btn.style" 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"></span>
      <span v-if="resize" class="vlayer__resize"></span>
    </div>
    <!-- 修复拖拽卡顿 -->
    <div class="vlayer__dragfix"></div>
  </div>
</template>

/**
 * @Desc     vue自定义桌面端弹层组件VLayer
 * @Time     andy by 2020-10-28
 * @About    Q：282310962  wx：xy190310
 */
<script>
  import domUtils from './utils/dom'
  let $index = 0, $lockCount = 0, $timer = {};
  let ie = !!window.ActiveXObject || "ActiveXObject" in window;
  export default {
    props: {
      // ...
    },
    data() {
      return {
        opened: false,
        closeCls: '',
        toastIcon: {
          // ...
        },
        messageIcon: {
          // ...
        },
        vlayerOpts: {},
        tipArrow: null,
      }
    },
    mounted() {
      window.addEventListener('resize', () => {
        this.autopos();
      })
    },
    computed: {
      vlayerId() {
        return this.id ? this.id : `vlayer-${domUtils.generateId()}`;
      }
    },
    watch: {
      value(val) {
        const type = val ? 'open' : 'close';
        this[type]();
      },
    },
    methods: {
      // 打开弹窗
      open() {
        if(this.opened) return;
        this.opened = true;
        this.$emit('open');
        typeof this.onOpen === 'function' && this.onOpen();
 
        const dom = this.$el;
        this.$nextTick(() => {
          document.body.appendChild(dom);
          
          this.auto();
        })
        
        this.callback();
      },
      // 关闭弹窗
      close() {
        if(!this.opened) return;
 
        let dom = this.$el;
        let vlayero = dom.querySelector('.vlayer__wrap');
        let ocnt = dom.querySelector('.vlayer__wrap-cntbox');
        let omax = dom.querySelector('.vlayer__maximize');
        
        this.closeCls = true;
        setTimeout(() => {
          this.opened = false;
          this.closeCls = false;
          if(this.vlayerOpts.lockScroll) {
            $lockCount--;
            if(!$lockCount) {
              document.body.style.paddingRight = '';
              document.body.classList.remove('nt-overflow-hidden');
            }
          }
          if(this.time) {
            $index--;
          }
 
          this.$emit('input', false);
          this.$emit('close');
          typeof this.onClose === 'function' && this.onClose();
        }, 200);
      },
 
      // 弹窗位置
      auto() {
        // ...
 
        this.autopos();
 
        // 全屏弹窗
        if(this.fullscreen) {
          this.full();
        }
 
        // 弹窗拖动|缩放
        this.move();
      },
 
      autopos() {
        if(!this.opened) return;
        let oL, oT;
        let pos = this.position;
        let isFixed = JSON.parse(this.fixed);
        let dom = this.$el;
        let vlayero = dom.querySelector('.vlayer__wrap');
        
        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(this.follow) {
          this.offset();
        }else {
          typeof pos === 'object' ? (
            oL = parseFloat(pos[0]) || 0, oT = parseFloat(pos[1]) || 0
          ) : (
            // ...
          )
 
          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
      offset() {
        let oW, oH, pS;
        let dom = this.$el;
        let vlayero = dom.querySelector('.vlayer__wrap');
 
        oW = vlayero.offsetWidth;
        oH = vlayero.offsetHeight;
        pS = domUtils.getFollowRect(this.follow, oW, oH);
        this.tipArrow = pS[2];
        
        vlayero.style.left = pS[0] + 'px';
        vlayero.style.top = pS[1] + 'px';
      },
 
      // 最大化弹窗
      full() {
        let timer;
        let isFixed = JSON.parse(this.fixed);
        let dom = this.$el;
        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;
 
        let rect = [
          parseFloat(domUtils.getStyle(vlayero, 'left')), parseFloat(domUtils.getStyle(vlayero, 'top')),
          parseFloat(domUtils.getStyle(vlayero, 'width')), parseFloat(domUtils.getStyle(vlayero, 'height'))||vlayero.offsetHeight
        ]
        this.vlayerOpts.rect = rect;
        
        clearTimeout(timer);
        timer = setTimeout(() => {
          vlayero.style.left = isFixed ? 0 : domUtils.scroll('left') + 'px';
          vlayero.style.top = isFixed ? 0 : domUtils.scroll('top') + 'px';
          vlayero.style.width = domUtils.client('width') + 'px';
          vlayero.style.height = domUtils.client('height') + 'px';
          ocnt.style.height = domUtils.client('height') - t - b + 'px';
        }, 16);
      },
 
      // 恢复弹窗
      restore() {
        let dom = this.$el;
        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;
        
        vlayero.style.left = parseFloat(this.vlayerOpts.rect[0]) + 'px';
        vlayero.style.top = parseFloat(this.vlayerOpts.rect[1]) + 'px';
        vlayero.style.width = parseFloat(this.vlayerOpts.rect[2]) + 'px';
        vlayero.style.height = parseFloat(this.vlayerOpts.rect[3]) + 'px';
        ocnt.style.height = parseFloat(this.vlayerOpts.rect[3]) - t - b + 'px';
      },
 
      // 拖动|缩放弹窗
      move() {
        // ...
      },
 
      // 事件处理
      callback() {
        // 倒计时关闭
        if(this.time) {
          $index++;
          // 防止重复点击
          if($timer[$index] !== null) clearTimeout($timer[$index])
          $timer[$index] = setTimeout(() => {
            this.close();
          }, parseInt(this.time) * 1000);
        }
      },
      // 点击最大化按钮
      maximizeClicked(e) {
        let o = e.target;
        if(o.classList.contains('maximized')) {
          // 恢复
          this.restore();
        } else {
          // 最大化
          this.full();
        }
      },
      // 点击遮罩层
      shadeClicked() {
        if(JSON.parse(this.shadeClose)) {
          this.close();
        }
      },
      // 按钮事件
      btnClicked(e, index) {
        let btn = this.btns[index];
        if(!btn.disabled) {
          typeof btn.click === 'function' && btn.click(e)
        }
      },
    },
  }
</script>

/**
 * 获取滚动条宽度（避免滚动条出现/消失，页面挤压）
 */
getScrollBarSize: function() {
    if (scrollBarWidth !== undefined) return scrollBarWidth;

    const outer = document.createElement('div');
    outer.style.visibility = 'hidden';
    outer.style.width = '100px';
    outer.style.position = 'absolute';
    outer.style.top = '-9999px';
    document.body.appendChild(outer);

    const widthNoScroll = outer.offsetWidth;
    outer.style.overflow = 'scroll';

    const inner = document.createElement('div');
    inner.style.width = '100%';
    outer.appendChild(inner);

    const widthWithScroll = inner.offsetWidth;
    outer.parentNode.removeChild(outer);
    scrollBarWidth = widthNoScroll - widthWithScroll;

    return scrollBarWidth;
},

<!-- 自定义弹窗位置 -->
<v-layer v-model="showPosition" xclose maximize drag=".dragImage" :position="rb">
    <img class="dragImage" src="xxx.jpg" style="max-width:100%;" />
</v-layer>

let $fwel = this.$vlayer.popover({
    follow: '#popover',
    icon: 'warning',
    content: '这是一段内容确定删除吗？', 
    time: null, 
    xclose: false,
    btns: [
        {text: 'no', click: () => { $fwel.close(); }},
        {text: 'yes', click: () => this.handleFn()},
    ],
    onClose: function() {
        this.$vlayer.message({content: 'success closed', icon: 'success'})
    }
});