How to watch directions of pagination in v-data-table vuetify - pagination

Question

I need make different get requests to backend
depending on whether I move forward or backward on the table. What event I must use and how to make this?

Answer 1

You could use #pagination event from data-table. It emits an object like this:
{page: 2, itemsPerPage: 5, pageStart: 5, pageStop: 10, pageCount: 2}
So you can capture it in a custom method and determine if 'page' value is higher or lower than current value in order to know if is forward or backward. An example:
<template>
<div>
<v-data-table
:headers="headers"
:items="desserts"
:items-per-page="5"
class="elevation-1"
#pagination="writeLog"
></v-data-table>
</div>
</template>
<script>
export default {
data () {
return {
headers: [
{
text: 'Dessert (100g serving)',
align: 'start',
sortable: false,
value: 'name',
},
{ text: 'Calories', value: 'calories' },
{ text: 'Fat (g)', value: 'fat' },
{ text: 'Carbs (g)', value: 'carbs' },
{ text: 'Protein (g)', value: 'protein' },
{ text: 'Iron (%)', value: 'iron' },
],
desserts: [
{
name: 'Frozen Yogurt',
calories: 159,
fat: 6.0,
carbs: 24,
protein: 4.0,
iron: '1%',
},
{
name: 'Ice cream sandwich',
calories: 237,
fat: 9.0,
carbs: 37,
protein: 4.3,
iron: '1%',
},
{
name: 'Eclair',
calories: 262,
fat: 16.0,
carbs: 23,
protein: 6.0,
iron: '7%',
},
{
name: 'Cupcake',
calories: 305,
fat: 3.7,
carbs: 67,
protein: 4.3,
iron: '8%',
},
{
name: 'Gingerbread',
calories: 356,
fat: 16.0,
carbs: 49,
protein: 3.9,
iron: '16%',
},
{
name: 'Jelly bean',
calories: 375,
fat: 0.0,
carbs: 94,
protein: 0.0,
iron: '0%',
},
{
name: 'Lollipop',
calories: 392,
fat: 0.2,
carbs: 98,
protein: 0,
iron: '2%',
},
{
name: 'Honeycomb',
calories: 408,
fat: 3.2,
carbs: 87,
protein: 6.5,
iron: '45%',
},
{
name: 'Donut',
calories: 452,
fat: 25.0,
carbs: 51,
protein: 4.9,
iron: '22%',
},
{
name: 'KitKat',
calories: 518,
fat: 26.0,
carbs: 65,
protein: 7,
iron: '6%',
},
],
}
currentPage = 1
},
methods: {
writeLog(paginationObject){
let action
console.log(paginationObject);
this.currentPage < paginationObject.page ? action = 'forward' : action ='backguard'
this.currentPage = paginationObject.page
console.log(action)
//Write code to call your backend using action...
}
},
}
</script>