Child emit does not update v-model prop Array of parent

Question

I'm using this parent component:

<template>
  <div id="cms-custom-editor" class="cms-custom-editor">
    <cms-editor-toolbar v-model:toggles="state.toggles"/>
    <div class="content">Toggle Buttons: {{ state.toggles }}</div>
  </div>
</template>


<script setup>
import CmsEditorToolbar from './cms-editor-toolbar.vue'
import {reactive, ref} from "vue";

const state = reactive({
    toggles: [],
})
</script>

to pass down state.toggles as a prop to the cms-editor-toolbar child component:

<template>
  <div id="cms-editor-toolbar" class="cms-editor-toolbar">
    <button @click="toggleButton"></button>
  </div>
</template>


<script setup>

const props = defineProps({
    toggles: Array,
})

const emit = defineEmits(['update:toggles'])

const toggleButton = () => {
    // ... logic to determine toggleAction
    console.log(toggleAction) // logs correct toggleAction
    emit('update:toggles', toggleAction) //emits only first toggleAction and no other
}

</script>

For whatever reason emit('update:toggles', toggleAction) only emits the first toggleAction to the parent. For every other change, the state.toggles array is not updated.

From the answer in this question , I've tried using ref instead of reactive :

<template>
  <div id="cms-custom-editor" class="cms-custom-editor">
    <cms-editor-toolbar v-model:toggles="toggles"/>
    <div class="content">Toggle Buttons: {{ toggles }}</div>
  </div>
</template>


<script setup>
import CmsEditorToolbar from './cms-editor-toolbar.vue'
import {reactive, ref} from "vue";

const toggles = ref([1,2,3])
</script>

but it changes nothing. Again the array is only updated once and no consecutive action has any effect. How do I make this work?

Edit:

I've added additional props (not arrays) to sibling elements inside the child, which not only are emitted correctly, but also trigger all actions of the array emit . Basically it seems to save the array inside the child until the emit is triggered by a sibling emit, which sends the complete array to the parent. No idea how this is happening.

Answer 1

I've been using the wrong method to check if state.toggles is updated. Rendering it in a paragraph usually works, but in this case it doesn't seem to be rerendered for whatever reason.

Logging the array inside the parent like so:

setInterval(function(){
    console.log(state.toggles)
}, 1000);

shows that it is indeed updating. The emits are working.