vue-dialog的弹出层组件

<template>
 <div> 
 <div class="modal-content" v-for="(comp,index) in comps" v-bind:style="style(index,comp)" >
 <div class="modal-header" >
 header
 </div>
 <div class="modal-body">
 <component :is="comp"></component>
 </div>
 <div class="modal-footer">
 <button type="button" class="btn btn-default" v-on:click="clickHandler(btn.value, comp, index)" v-for="btn in btns" >{{btn.text}}</button>
 </div>
 </div> 
 <hDialogBack ref="back" v-bind:z-index="realIndex-1" ></hDialogBack>
 </div>
</template>

<script>
import hDialogBack from './background'

function getclientPoint () {
 return {
 width: document.documentElement.clientWidth || document.body.clientWidth,
 height: document.documentElement.clientHeight || document.body.clientHeight
 }
}

export default {
 name: 'HDialog',
 data () {
 return {
 comps: []
 }
 },
 props: {
 'btns': {
 type: Array,
 default: function () {
 return [{ text: 'ok', value: 'ok'}, { text: 'cancel', value: 'cancel'}]
 }
 },
 'mIndex': {
 type: Number,
 default: 19861016
 }
 },
 computed: {
 realIndex: function () {
 return this.mIndex
 }
 },
 components: {
 hDialogBack
 },
 methods: {
 open: function (comp) {
 comp.promise = new Promise(function (resolve, reject) {
 comp.resolve = resolve
 comp.reject = reject
 })
 comp.width = comp.width || 600
 comp.height = comp.height || 400
 this.comps.push(comp)
 if (!this.$refs.back.show) {
 this.$refs.back.open()
 }
 return comp.promise
 },
 clickHandler: function (type, comp, index) {
 let self = this
 let close = function () {
 self.comps.splice(index, 1)
 if (self.comps.length === 0 && self.$refs.back.show) {
 self.$refs.back.close()
 }
 }
 /** 只提供promise模式 */
 comp.resolve({'type': type, 'close': close})
 },
 style: function (index, comp) {
 let point = getclientPoint()
 return {
 zIndex: this.realIndex + index,
 width: comp.width + 'px',
 height: comp.height + 'px',
 left: ((point.width - comp.width) / 2) + 'px',
 top: ((point.height - comp.height) / 2) + 'px'
 }
 }
 }
}
</script>

<style>
.modal-content {
 position: absolute;
}
</style>

new Vue({
 el: '#app',
 template: '<div><App></App><HDialog ref="hDialog" ></HDialog></div>',
 components: { App }
})

let promise = this.$root.$refs.hDialog.open({
 template: '<div>第二层了</div>'
 })
 promise.then(function (arg) {
 alert('第二层' + arg.type)
 arg.close()
})

output: {
path: './dist',
filename: '[name].js',
library: 'vue-hdialog',
libraryTarget: 'commonjs2'
}