york-demo-ui/packages/Dialog/index.js

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import Dialog from './src/Dialog'
let Confirm = {}

const getInstance = (() => {
  let instance = null
  return function (Confirm, options ) {
    if(!instance) {
      instance = new Confirm({ options })
    }
    return instance
  }
})()
Confirm.install = function (Vue, options) {
  let DialogCtor = Vue.extend(Dialog)
  Vue.prototype.$confirm = ({ title }, el) => {
    let instance = getInstance(DialogCtor, { propsData: { title:'哈哈哈' } })
    document.body.appendChild(instance.$mount().$el)
    instance.visible = true
    return new Promise((resolve,reject) => {
      instance.$on('confirm', (text) => {
        console.log(text)
        instance.visible = false
        resolve()
      })
      instance.$on('cancel', () => {
        instance.visible = false
        reject('')
      })
    })
  }
}


export  default  Confirm