BUG | `useElementSize` | TS error if templateRef target uses emit

[kubajmarek]

Describe the bug

The bug is simple, if the useElementSize is used with templateRef that targets Vue Component, and that component emits, then TypeScript will fail:

types of property '$emit' are incompatible.
                  Type '(event: "mounted", ...args: any[]) => void' is not assignable to type '(event: string, ...args: any[]) => void'.
                    Types of parameters 'event' and 'event' are incompatible.
                      Type 'string' is not assignable to type '"mounted"'.

This happens regardless if emit is consumed by parent or not, and regardless of which defineEmits syntax we're using.

I've also found this issue with useFocusWithin, so all functions taking MaybeElement might be affected.

Reproduction

https://stackblitz.com/edit/stackblitz-starters-jqvqqvmh

System Info

System:
    OS: Linux 5.0 undefined
    CPU: (8) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
    Memory: 0 Bytes / 0 Bytes
    Shell: 1.0 - /bin/jsh
  Binaries:
    Node: 20.19.1 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 10.8.2 - /usr/local/bin/npm
    pnpm: 8.15.6 - /usr/local/bin/pnpm
  npmPackages:
    @vueuse/core: ^13.9.0 => 13.9.0 
    vue: ^3.5.22 => 3.5.22

Used Package Manager

npm

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Make sure this is a VueUse issue and not a framework-specific issue. For example, if it's a Vue SFC related bug, it should likely be reported to https://github.com/vuejs/core instead.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion.
• The provided reproduction is a minimal reproducible example of the bug.

[Stan-BK]

This appears to be an issue because the actual parameters passed to $emit do not correctly correspond to the $emit provided by the VueInstance type. I provide the additional parsing method for it that resolve your problem.