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import React, { useEffect, useState } from 'react';
import { Avatar, List, message } from 'antd';
import VirtualList from 'rc-virtual-list';
interface UserItem {
email: string;
gender: string;
name: string;
avatar: string;
}
const CONTAINER_HEIGHT = 400;
const PAGE_SIZE = 20;
const App: React.FC = () => {
const [data, setData] = useState<UserItem[]>([]);
const [page, setPage] = useState(1);
const appendData = (showMessage = true) => {
const fakeDataUrl = `https://660d2bd96ddfa2943b33731c.mockapi.io/api/users/?page=${page}&limit=${PAGE_SIZE}`;
fetch(fakeDataUrl)
.then((res) => res.json())
.then((body) => {
const results = Array.isArray(body) ? body : [];
setData(data.concat(results));
setPage(page + 1);
showMessage && message.success(`${results.length} more items loaded!`);
});
};
useEffect(() => {
appendData(false);
}, []);
const onScroll = (e: React.UIEvent<HTMLElement, UIEvent>) => {
// Refer to: https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollHeight#problems_and_solutions
if (
Math.abs(e.currentTarget.scrollHeight - e.currentTarget.scrollTop - CONTAINER_HEIGHT) <= 1
) {
appendData();
}
};
return (
<List>
<VirtualList
data={data}
height={CONTAINER_HEIGHT}
itemHeight={47}
itemKey="email"
onScroll={onScroll}
>
{(item: UserItem) => (
<List.Item key={item.email}>
<List.Item.Meta
avatar={<Avatar src={item.avatar} />}
title={<a href="https://ant.design">{item.name}</a>}
description={item.email}
/>
<div>Content</div>
</List.Item>
)}
</VirtualList>
</List>
);
};
export default App;
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