Why is there no expose property on the component instance?

[atox996]

Vue version

latest

Link to minimal reproduction

https://play.vuejs.org/#eNp9Ul9LwzAQ/yolL91gtIzpyygDlT0oosP5ZkRKe+uytUlIrrUy9t29pLQbOPdSevf7w+8ud2B3WkdNDWzOEpsZoTGwgLVecCkqrQwGD6rSwcaoKgij2BWOHnKZKWlVCVGpipFrj7lM4s6CxFQgVLpMEagKgmQ7XTwrtSc7L0tiajjFGYtNGFqy3Ygi2lklKdPBaTnLyF+UYF41CtJzNg884rC0LNX3k++hqWHS97MtZPsL/Z1tXY+zlQELpgHOBgxTUwB28HL9Ai39D2Cl8rok9hXwDWi22mXsaPe1zCn2Gc+nffSbFbJ4t8sWQdp+KBfUMY+ezxlt2q32v9FPcWfRjddxeaQt9q904VFz2AgJK6O0HXkfmVYwWOKPpmKNhrL1fvSunWhZCbSjjzDbprKA8PMEtFpZ6OwQLI7Gvd/5jYQOCkk02F47l1w0iyR2379H8tWAcSuj8WbRbTSdseMvmnvuRQ==

Steps to reproduce

What is expected?

includes expose

What is actually happening?

When inspecting a Vue component instance via console.log, I found that its prototype contains properties like emits, props, render, and setup, but there is no expose.

Why is that? If expose were also available on the component instance, it would make it much easier to re-expose the internals of a wrapped component when creating higher-order components.

Was this an intentional design choice?

System Info

Any additional comments?

No response

[jh-leong]

The Comp you're logging is the component definition (object), not a component instance. When you console.log the imported component, you're seeing its static definition, not a mounted instance with runtime properties.

For HOCs, you'd typically use expose() within the component's setup() function, then access exposed properties through template refs on the instance.