data-request
Description
Fires while scrolling or at the initialization stage if dynamic data loading is enabledUsage
"data-request": CustomEvent;
Parameters
The callback of the action is the function with the following parameter:
CustomEvent
- a Svelte custom event which you can bind to the event handler
Example
In the example below we use the dynamic
property to enable dynamic data loading and specify the number of all rows in a dataset. The data-request
action is triggered while scrolling and we add the event handler that receives the row.start and row.end values and loads data.
<script>
import { Grid } from "@wx/svelte-grid";
import { getData } from "./common/data";
const { allData, columns } = getData();
let rowsCount = 500;
let data = [];
function dataProvider(ev) {
const { requestData } = ev.detail;
const { row } = requestData;
if (row) data = allData.slice(row.start, row.end);
}
</script>
<Grid
data={allData}
{columns}
dynamic={{ rowsCount }}
on:data-request={dataProvider} />
Related articles: Dynamic data loading