Changing class on radio button change - vue.js

Question

My first column (Test1) is active, so the background turns orange. Why does the active class not change to the second column (Test2) when I click the radio button?
I'd like it to change the active class when the radio button is clicked.
I have the following template:
<template v-if="columns" v-for="(item, index) in columns" v-bind="item">
<div class="card-container"
:style="{'height': item.height+'%'}"
:class="{ active: item.active}">
<div class="card-inner">
<input type="radio" v-if="item.selectedDefault" checked v-model="currentInput" name="cardRadioGroup"
:value="item.id" v-on:change="updateDetails(item, index)"/>
<input type="radio" v-else v-model="currentInput" name="cardRadioGroup" :value="item.id"
v-on:change="updateDetails(item, index)"/>
<template v-if="item.gbAmount === null">
Onbeperkt
</template>
<template v-else>
{{ item.gbAmount }} GB
</template>
{{ currentInput }}
</div>
</div>
</template>
With the following Vue code:
import {onMounted} from "vue";
export default {
name: 'Card',
components: {Details},
data() {
const columns =
{
"Test1": {
"id": 1,
"gbAmount": 0,
"price": 5,
"selectedDefault": false,
"informationGet": ["bla", "bla"],
"informationUsing": "Boop.",
"recommended": false,
"height": 16.66,
"active": true,
},
"Test2": {
"id": 2,
"gbAmount": 1,
"price": 10,
"selectedDefault": false,
"informationGet": ["beh", "beh"],
"informationUsing": "Beep",
"recommended": false,
"height": 33.33,
"active": false,
},
}
return {
columns,
currentColumn: {},
checkedCard: [],
currentInput: null,
};
},
methods: {
updateDetails(item, index) {
this.currentColumn = {
...item,
name: index,
active: true,
}
console.log($(this.currentColumn));
},
},
setup() {
return {};
},
};
And CSS:
.active {
background: orange;
}

Answer 1

You update this.currentColumn but in template use this.columns. Correct will be:
updateDetails(item, index) {
Object.keys(this.columns).forEach(key => this.columns[key].active = false);
this.columns[index].active = true;
console.log(this.columns);
}

Answer 2

<template>
<div v-for="column in columns" :key="column.id">
<div
class="card-container"
:style="{ height: column.height + '%' }"
:class="{ active: column.id === currentInput }"
>
<div class="card-inner">
<input
type="radio"
name="cardRadioGroup"
:value="column.id"
v-model="currentInput"
/>
<template v-if="column.gbAmount === null"> Onbeperkt </template>
<template v-else> {{ column.gbAmount }} GB </template>
{{ currentInput }}
</div>
</div>
</div>
</template>
<script lang="ts">
import { ref } from 'vue'
const columns = [
{
id: 1,
gbAmount: 0,
price: 5,
selectedDefault: false,
informationGet: ['bla', 'bla'],
informationUsing: 'Boop.',
recommended: false,
height: 16.66,
},
{
id: 2,
gbAmount: 1,
price: 10,
selectedDefault: false,
informationGet: ['beh', 'beh'],
informationUsing: 'Beep',
recommended: false,
height: 33.33,
},
]
export default {
name: 'Card',
setup() {
const currentInput = ref(columns[0].id)
return {
columns,
currentInput,
}
},
}
</script>