基于Vue3.0开发轻量级手机端弹框组件V3Popup的场景分析

import { createApp } from 'vue'
import App from './App.vue'

const app = createApp(App)

// 引入弹窗组件v3popup
import V3Popup from './components/v3popup'

app.use(V3Popup)
app.mount('#app')

<v3-popup 
  v-model="showDialog"
  title="标题"
  content="<p style='color:#df6a16;padding:10px;'>这里是内容信息！</p>"
  type="android"
  shadeClose="false"
  xclose
  :btns="[
    {text: '取消', click: () => showDialog=false},
    {text: '确认', style: 'color:#f90;', click: handleOK},
  ]"
  @success="handleOpen"
  @end="handleClose"
/>
  <template #content>这里是自定义插槽内容信息！</template>
</v3-popup>

let $el = this.$v3popup({
  title: '标题',
  content: '<p style='color:#df6a16;padding:10px;'>这里是内容信息！</p>',
  type: 'android',
  shadeClose: false,
  xclose: true,
  btns: [
    {text: '取消', click: () => { $el.close(); }},
    {text: '确认', style: 'color:#f90;', click: () => handleOK},
  ],
  onSuccess: () => {},
  onEnd: () => {}
})

// vue2.x中调用
methods: {
  showDialog() {
    this.$v3popup({...})
  }
}

// vue3.x中调用
setup() {
  // 获取上下文
  const { ctx } = getCurrentInstance()
  ctx.$v3popup({...})
}

// vue2.x中调用
methods: {
  showDialog() {
    this.v3popup({...})
  }
}

// vue3.x中调用
setup() {
  const v3popup = inject('v3popup')
  
  const showDialog = () => {
    v3popup({...})
  }

  return {
    v3popup,
    showDialog
  }
}

|props参数|
v-model     是否显示弹框
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      弹窗类型（toast | footer | actionsheet | actionsheetPicker | android | ios）
popupStyle   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
opacity     遮罩层透明度
round      是否显示圆角
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）
position    弹出位置（top | right | bottom | left）
follow     长按/右键弹窗（坐标点）
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"
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__popup" :class="{'vui__popup-closed': closeCls}" :id="id">
    <!-- //蒙层 -->
    <div v-if="JSON.parse(shade)" class="vui__overlay" @click="shadeClicked" :style="{opacity}"></div>
    <div class="vui__wrap">
      <div class="vui__wrap-section">
        <div class="vui__wrap-child" :class="['anim-'+anim, type&&'popupui__'+type, round&&'round', position]" :style="[popupStyle]">
          <div v-if="title" class="vui__wrap-tit" v-html="title"></div>
          <div v-if="type=='toast'&&icon" class="vui__toast-icon" :class="['vui__toast-'+icon]" v-html="toastIcon[icon]"></div>
          <!-- 判断插槽是否存在 -->
          <template v-if="$slots.content">
            <div class="vui__wrap-cnt"><slot name="content" /></div>
          </template>
          <template v-else>
            <div v-if="content" class="vui__wrap-cnt" v-html="content"></div>
          </template>
          <slot />
          <div v-if="btns" class="vui__wrap-btns">
            <span v-for="(btn, index) in btns" :key="index" class="btn" :style="btn.style" @click="btnClicked($event, index)" v-html="btn.text"></span>
          </div>
          <span v-if="xclose" class="vui__xclose" :class="xposition" :style="{'color': xcolor}" @click="close"></span>
        </div>
      </div>
    </div>
  </div>
</template>

/**
 * @Desc   Vue3.0自定义弹框组件V3Popup
 * @Time   andy by 2020-12
 * @About  Q：282310962 wx：xy190310
 */
<script>
  import { onMounted, ref, reactive, watch, toRefs, nextTick } from 'vue'
  let $index = 0, $locknum = 0, $timer = {}
  export default {
    props: {
      // 接收父组件v-model值，如果v-model:open，则这里需写open: {...}
      modelValue: { type: Boolean, default: false },
      // 标识符，相同ID共享一个实例
      id: {
        type: String, default: ''
      },
      title: String,
      content: String,
      type: String,
      popupStyle: String,
      icon: String,
      shade: { type: [Boolean, String], default: true },
      shadeClose: { type: [Boolean, String], default: true },
      opacity: { type: [Number, String], default: '' },
      round: Boolean,
      xclose: Boolean,
      xposition: { type: String, default: 'right' },
      xcolor: { type: String, default: '#333' },
      anim: { type: String, default: 'scaleIn' },
      position: String,
      follow: { type: Array, default: null },
      time: { type: [Number, String], default: 0 },
      zIndex: { type: [Number, String], default: '8080' },
      teleport: [String, Object],
      btns: {
        type: Array, default: null
      },
      onSuccess: { type: Function, default: null },
      onEnd: { type: Function, default: null },
    },
    emits: [
      'update:modelValue'
    ],
    setup(props, context) {
      const elRef = ref(null)

      const data = reactive({
        opened: false,
        closeCls: '',
        toastIcon: {
          ...
        }
      })

      onMounted(() => {
        ...
      })

      // 监听弹层v-model
      watch(() => props.modelValue, (val) => {
        if(val) {
          open()
        }else {
          close()
        }
      })

      // 打开弹层
      const open = () => {
        if(data.opened) return
        data.opened = true
        typeof props.onSuccess === 'function' && props.onSuccess()

        const dom = elRef.value
        dom.style.zIndex = getZIndex() + 1

        ...

        // 倒计时
        if(props.time) {
          $index++
          // 避免重复操作
          if($timer[$index] !== null) clearTimeout($timer[$index])
          $timer[$index] = setTimeout(() => {
            close()
          }, parseInt(props.time) * 1000)
        }

        // 长按|右键菜单
        if(props.follow) {
          ...
        }
      }

      // 关闭弹层
      const close = () => {
        if(!data.opened) return

        data.closeCls = true
        setTimeout(() => {
          ...

          context.emit('update:modelValue', false)
          typeof props.onEnd === 'function' && props.onEnd()
        }, 200)
      }

      // 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,
        shadeClicked,
        btnClicked,
      }
    }
  }
</script>

import { createApp } from 'vue'
import PopupConstructor from './popup.vue'

let $inst
// 创建挂载实例
let createMount = (opts) => {
  const mountNode = document.createElement('div')
  document.body.appendChild(mountNode)

  const app = createApp(PopupConstructor, {
    ...opts, modelValue: true,
    remove() {
      app.unmount(mountNode)
      document.body.removeChild(mountNode)
    }
  })
  return app.mount(mountNode)
}

function V3Popup(options = {}) {
  options.id = options.id || 'v3popup_' + generateId()
  $inst = createMount(options)
  
  return $inst
}

V3Popup.install = app => {
  app.component('v3-popup', PopupConstructor)
  // app.config.globalProperties.$v3popup = V3Popup
  app.provide('v3popup', V3Popup)
}