TypeError:[plugins].flat is not a function

[yangg19]

Hello! When i using Vue2, according to the dependencies version and code in the document, there is noo error at runtime, but the following error occurs when actually entering the web page:
Error in mounted hook: "TypeError:[plugins].flat is not a function"
How to solve this problem? I hope good guys who encouter this problem can help answer it. Thanks!

我在使用Vue2时，按照文档里的依赖版本和代码，运行时没有报错，但是真正进入网页时出现了如下错误：
Error in mounted hook: "TypeError:[plugins].flat is not a function"
请问该如何解决这个问题呢？

[Saul-Mirone]

What if you input [].flat() in the Console panel of your browsers dev tools?

[yangg19]

im using chrome,version:67.0.3396.87

[Saul-Mirone]

I think update to a newer chrome can be helpful.

[yangg19]

thanks i will try!

[yangg19]

I'm ashamed to bother you again, but I really like your editor. I've tried for two days and still haven't found the problem. I have to ask you again.
I have updated chrome to the latest version and operated in full accordance with the instructions. The console reports an error: uncaught (in promise) type error: cannot read properties of undefined (reading 'injectglobal')
I located the problematic code in /design system / lib / index es.js. Const CSS = emotion.injectGlobal in the injectvar method
I hope you can see if you know where my operation is wrong when you are free，thanks!

[yangg19]

If this will take you too much time, please ignore my request and don't want my case to trouble you