app/javascript/vue/tasks/field_occurrences/new_field_occurrences/components/FieldOccurenceForm/FieldIsAbsent.vue
<template>
<div>
<label>
<input
type="checkbox"
v-model="fieldOccurence.is_absent"
@change="() => { fieldOccurence.isUnsaved = true }"
/>
Is absent</label
>
</div>
</template>
<script setup>
const fieldOccurence = defineModel()
</script>