vue组件全局挂载，js调用

import TipMessage from './index.vue'（待挂载的组件）

const tipMessage = {}

tipMessage.install = function(Vue, options = {}) {

  const MessageConstructor = Vue.extend(TipMessage)

  const instance = new MessageConstructor(options)

  instance.$mount()

  document.body.appendChild(instance.$mount().$el)

  Vue.prototype.$tipMessage = (param) => {

    instance.tipMessage(param)

    return instance

  }

}

export default tipMessage

main.js中注册