if I mount some properties on a function，these properties will disappear when the function is passed

[shlroland]

here‘s a demo

i cann't take the other properties which mounted on the function

[ygj6]

@shlroland
Change:
const testFn = () => { console.log(1); };
To:
const testFn = ref(() => { console.log(1); });

will solve your problem!

In composition-api, we should using reactive or ref API to declare reactive state, so does the testFn

[ygj6]

@shlroland Sorry, the description is not clear. Please refer to this link for details.