67 | )
68 | }
69 | }
70 |
71 | export default Chart;
72 |
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/src/index.css:
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1 | body {
2 | margin: 0;
3 | padding: 0;
4 | font-family: sans-serif;
5 | }
6 |
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/src/index.js:
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1 | import React from 'react';
2 | import ReactDOM from 'react-dom';
3 | import App from './App';
4 | import registerServiceWorker from './registerServiceWorker';
5 | import './index.css';
6 |
7 | ReactDOM.render(, document.getElementById('root'));
8 | registerServiceWorker();
9 |
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/src/logo.svg:
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1 |
8 |
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/src/registerServiceWorker.js:
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1 | // In production, we register a service worker to serve assets from local cache.
2 |
3 | // This lets the app load faster on subsequent visits in production, and gives
4 | // it offline capabilities. However, it also means that developers (and users)
5 | // will only see deployed updates on the "N+1" visit to a page, since previously
6 | // cached resources are updated in the background.
7 |
8 | // To learn more about the benefits of this model, read https://goo.gl/KwvDNy.
9 | // This link also includes instructions on opting out of this behavior.
10 |
11 | export default function register() {
12 | if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
13 | window.addEventListener('load', () => {
14 | const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
15 | navigator.serviceWorker
16 | .register(swUrl)
17 | .then(registration => {
18 | registration.onupdatefound = () => {
19 | const installingWorker = registration.installing;
20 | installingWorker.onstatechange = () => {
21 | if (installingWorker.state === 'installed') {
22 | if (navigator.serviceWorker.controller) {
23 | // At this point, the old content will have been purged and
24 | // the fresh content will have been added to the cache.
25 | // It's the perfect time to display a "New content is
26 | // available; please refresh." message in your web app.
27 | console.log('New content is available; please refresh.');
28 | } else {
29 | // At this point, everything has been precached.
30 | // It's the perfect time to display a
31 | // "Content is cached for offline use." message.
32 | console.log('Content is cached for offline use.');
33 | }
34 | }
35 | };
36 | };
37 | })
38 | .catch(error => {
39 | console.error('Error during service worker registration:', error);
40 | });
41 | });
42 | }
43 | }
44 |
45 | export function unregister() {
46 | if ('serviceWorker' in navigator) {
47 | navigator.serviceWorker.ready.then(registration => {
48 | registration.unregister();
49 | });
50 | }
51 | }
52 |
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55 |