[Vuejs]-Emit value from child to parent component

This line is wrong:

v-on:input="$emit('input', value)"

This is emitting the old value.

It should be:

v-on:input="$emit('input', $event)"

This will emit the new value.

Alternatively you could use:

v-on:input="value => $emit('input', value)"

Or move it out to a method in methods.