How to use @change/@input for changing a local value

[a1danw]

Is it possible to use an @change or @input to watch for a state change as I need my button to be disabled on mount until a value changes but its not achievable with v-model as it triggers on mount. I have tried adding @input="changed = true" but its not triggering

[a1danw]

I used a combination of @OPEN="dropdownOpened" and watch to look out for new changes.