Why use the parent instance $createElemen method

[HcySunYang]

Why do you override the $createElemen method of the current instance via mixins as the $createElemen method of the parent instance？

this.$createElement = this.$parent.$createElement

[jackmellis]

It was a while ago now but it had something to do with slots being called with the incorrect context.

See this comment for the point at which we started using this approach:

vuejs/vue#6201 (comment)

[HcySunYang]

@jackmellis Thanks for your reply, I did some research and I have understood the reason for doing so. I wrote a blog to explain HOC, but it is Chinese：http://hcysun.me/2018/01/05/%E6%8E%A2%E7%B4%A2Vue%E9%AB%98%E9%98%B6%E7%BB%84%E4%BB%B6/