React List - Customize Group Headers
You can define a groupTemplate to customize group headers. Without a groupTemplate, group headers display the text of the key field in bold font.
App.js
- import React from 'react';
- import 'devextreme/dist/css/dx.light.css';
- import List from 'devextreme-react/list';
- import DataSource from 'devextreme/data/data_source';
- const fruitsVegetables = [{
- key: "Fruits",
- items: [
- { name: "Apples", count: 10 },
- { name: "Oranges", count: 12 },
- { name: "Lemons", count: 15 }
- ]
- }, {
- key: "Vegetables",
- items: [
- { name: "Potatoes", count: 5 },
- { name: "Tomatoes", count: 9 },
- { name: "Turnips", count: 8 }
- ]
- }];
- const listDataSource = new DataSource({
- store: fruitsVegetables,
- map: function(groupedItem) {
- let overallCount = 0;
- groupedItem.items.forEach(function(item) {
- overallCount += item.count;
- });
- return Object.assign(groupedItem, { overallCount: overallCount });
- }
- });
- const ListItem = (data) => {
- return (
- <p style={{ margin: '0px' }}>{ data.name } | { data.count }</p>
- );
- };
- const ListGroupHeader = (data) => {
- return (
- <p>{ data.key } | { data.overallCount }</p>
- );
- };
- export default function App() {
- return (
- <List
- dataSource={listDataSource}
- grouped={true}
- itemRender={ListItem}
- groupRender={ListGroupHeader}
- />
- );
- }
See Also
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