Can't access _uid in constrcutor

Version

vue: 2.5.22 vue-class-component: 6.3.2

Reproduction link

https://jsfiddle.net/heaven_xz/uLy6rpwx/

Steps to reproduce

open chrome devtools and see the console

What is expected?

I can access the _uid

What is actually happening?

I can’t access the _uid in the component constructor if I use the decorator of vue-class-component, but without the decorator, I can access the _uid

------------------------- update --------------------------

Seems like I can’t access any fields which has been inited in the Vue constructor if I use decorator(see https://jsfiddle.net/heaven_xz/uLy6rpwx/3/), but I don’t know why I can access $root

[kaorun343]

@NE-SmallTown

Hi.

In the constructer with the @Component decorator, this is not an instance of Vue due to the technical reason, so _uid is not available.

Also, _uid is private, not documented, so maybe it’s better I think to generate a unique id by yourself.

[kaorun343]

The role of @Component is to create a component option from a class. So as to do this, the decorator collect the properties and methods which defined by users. This feature is related to the issue you mentioned.

It’s available to pass a component option to @Component decorator directly , so inside of data function of the argument, you’re able to use this._uid.