报错Unknown custom element: ＜组件名＞ - did you register the component correctly?的原因及解决办法

组件循环嵌套引用时会报错：Unknown custom element: ＜组件名＞ - did you register the component correctly?

解决办法：

beforeCreate() {

  this.$options.components.组件名称 = require('组件引用地址').default

}

例如：

html：

<MenuData ref="MenuData" :canvas="canvas" :flag="false" />

JS:

  beforeCreate () {

    this.$options.components.MenuData = require('./components/MenuData').default 

  },