Custom Hook for Asynchronous Data Fetching in Charts
Create a custom React hook that fetches data asynchronously and updates the chart, demonstrating how to integrate it with TanStack React Charts.
import { useState, useEffect } from 'react';
import axios from 'axios';
Imports the necessary hooks from React and axios for making HTTP requests.
const useFetchChartData = (url) => {
const [data, setData] = useState([]);
const [loading, setLoading] = useState(true);
const [error, setError] = useState(null);
useEffect(() => {
setLoading(true);
axios.get(url)
.then(response => {
setData(response.data);
setLoading(false);
})
.catch(error => {
setError(error);
setLoading(false);
});
}, [url]);
return { data, loading, error };
};
Defines a custom hook useFetchChartData to asynchronously fetch data for the chart. It returns the fetched data, loading state, and any error encountered.
import { useChart } from '@tanstack/react-charts';
function MyChartComponent() {
const { data, loading, error } = useFetchChartData('https://api.example.com/data');
if (loading) return <div>Loading...</div>;
if (error) return <div>Error: {error.message}</div>;
// Transform data for the chart if necessary
const chartData = {
labels: data.map(item => item.label),
datasets: [{
label: 'Dataset 1',
data: data.map(item => item.value),
}],
};
const chart = useChart({
type: 'bar', // or any other type
data: chartData,
});
return <div>{chart}</div>;
}
This component uses the custom hook useFetchChartData to fetch data and then uses it to render a chart with TanStack React Charts. It handles loading and error states.