vue插件编写（toast、loading之类全局组件的开发）

方式一、Vue.extend,使用基础Vue构造器，创建一个子类

import LoadingComp from ‘@/components/loading’
const LoadConstruncor = Vue.extend(LoadingComp)
const  instance = new LoadConstruncor()
Instance.$mount(document.createElement(‘div’))
document.body.appendChild(instance.$el)

Vue.prototype.$showLoading = () =>{
Instance.msg = msg
Instance.theloading = true
}
 Vue.prototype.$hideLoading = () => {
        instance.theLoading = false;
    }

方式二、new Vue() 借鸡生蛋

function create(Copponent， props){
  Const vm=new Vue({
	render:(h)=>h(component,{props})
}).$mount()
Document.body.appendChild(vm.$el)
Const instance = vm.$children[0]
Comp.remove=()=>{
	document.body.removeChild(vm.$el)
Vm.destroy()
}
Return comp
}