Hiding the Expand Icon in Vuetify's v-data-table When No Data is Present
The Problem: Vuetify's v-data-table component displays an expand icon even when there's no data to expand. This can be confusing for users and creates an unnecessary visual element.
Rephrasing: Imagine you're browsing a table that shows your shopping cart items. If your cart is empty, there shouldn't be an "expand" button that does nothing, right? That's the issue we're addressing here.
Scenario: You're building an application with a v-data-table displaying a list of items. You've implemented an expandable feature, but when the table is empty, the expand icon still shows up.
Original Code:
<template>
<v-data-table
:headers="headers"
:items="items"
:items-per-page="5"
hide-actions
>
<template v-slot:item.actions="{ item }">
<v-btn icon small @click="expandItem(item)">
<v-icon>mdi-chevron-down</v-icon>
</v-btn>
</template>
</v-data-table>
</template>
<script>
export default {
data() {
return {
headers: [
{ text: 'ID', value: 'id' },
{ text: 'Name', value: 'name' },
{ text: 'Actions', value: 'actions', sortable: false },
],
items: [], // This is initially empty
};
},
methods: {
expandItem(item) {
// Implementation for expanding the item
}
}
};
</script>
Analysis:
The issue arises because Vuetify's v-data-table doesn't automatically hide the expand icon when there are no items. You need to implement a conditional rendering solution.
Solution:
The most straightforward approach is to conditionally render the v-btn element inside the v-slot:item.actions template based on the items array length:
<template v-slot:item.actions="{ item }">
<v-btn
v-if="items.length > 0"
icon small
@click="expandItem(item)"
>
<v-icon>mdi-chevron-down</v-icon>
</v-btn>
</template>
Explanation:
v-if="items.length > 0": This directive checks if theitemsarray has at least one item.- If
items.lengthis greater than 0, thev-btnis rendered, showing the expand icon. - If the
itemsarray is empty, thev-btnwon't be rendered, effectively hiding the expand icon.
Further Optimization:
- You can add a message indicating no items are found.
- You can use CSS to visually style the empty table, making it more user-friendly.
Example:
<template>
<v-data-table
:headers="headers"
:items="items"
:items-per-page="5"
hide-actions
>
<template v-slot:item.actions="{ item }">
<v-btn
v-if="items.length > 0"
icon small
@click="expandItem(item)"
>
<v-icon>mdi-chevron-down</v-icon>
</v-btn>
</template>
<template v-slot:no-data>
<v-alert type="info" icon="mdi-alert-circle-outline">
No items found.
</v-alert>
</template>
</v-data-table>
</template>
Conclusion:
By conditionally rendering the expand icon based on the presence of data, you can create a more intuitive and visually appealing v-data-table component. This simple code adjustment improves the user experience and avoids unnecessary visual clutter.
References:
