Initialize project using Create React App

src/App.js

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+import React from 'react';
+import {
+  ChakraProvider,
+  Box,
+  Text,
+  Link,
+  VStack,
+  Code,
+  Grid,
+  theme,
+} from '@chakra-ui/react';
+import { ColorModeSwitcher } from './ColorModeSwitcher';
+import { Logo } from './Logo';
+
+function App() {
+  return (
+    <ChakraProvider theme={theme}>
+      <Box textAlign="center" fontSize="xl">
+        <Grid minH="100vh" p={3}>
+          <ColorModeSwitcher justifySelf="flex-end" />
+          <VStack spacing={8}>
+            <Logo h="40vmin" pointerEvents="none" />
+            <Text>
+              Edit <Code fontSize="xl">src/App.js</Code> and save to reload.
+            </Text>
+            <Link
+              color="teal.500"
+              href="https://chakra-ui.com"
+              fontSize="2xl"
+              target="_blank"
+              rel="noopener noreferrer"
+            >
+              Learn Chakra
+            </Link>
+          </VStack>
+        </Grid>
+      </Box>
+    </ChakraProvider>
+  );
+}
+
+export default App;

src/App.test.js

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+import React from 'react';
+import { screen } from '@testing-library/react';
+import { render } from './test-utils';
+import App from './App';
+
+test('renders learn react link', () => {
+  render(<App />);
+  const linkElement = screen.getByText(/learn chakra/i);
+  expect(linkElement).toBeInTheDocument();
+});

src/ColorModeSwitcher.js

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+import React from 'react';
+import { useColorMode, useColorModeValue, IconButton } from '@chakra-ui/react';
+import { FaMoon, FaSun } from 'react-icons/fa';
+
+export const ColorModeSwitcher = props => {
+  const { toggleColorMode } = useColorMode();
+  const text = useColorModeValue('dark', 'light');
+  const SwitchIcon = useColorModeValue(FaMoon, FaSun);
+
+  return (
+    <IconButton
+      size="md"
+      fontSize="lg"
+      aria-label={`Switch to ${text} mode`}
+      variant="ghost"
+      color="current"
+      marginLeft="2"
+      onClick={toggleColorMode}
+      icon={<SwitchIcon />}
+      {...props}
+    />
+  );
+};

src/Logo.js

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+import React from 'react';
+import { Image, keyframes, usePrefersReducedMotion } from '@chakra-ui/react';
+import logo from './logo.svg';
+
+const spin = keyframes`
+  from { transform: rotate(0deg); }
+  to { transform: rotate(360deg); }
+`;
+
+export const Logo = props => {
+  const prefersReducedMotion = usePrefersReducedMotion();
+
+  const animation = prefersReducedMotion
+    ? undefined
+    : `${spin} infinite 20s linear`;
+
+  return <Image animation={animation} src={logo} {...props} />;
+};

src/index.js

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+import { ColorModeScript } from '@chakra-ui/react';
+import React, { StrictMode } from 'react';
+import * as ReactDOM from 'react-dom/client';
+import App from './App';
+import reportWebVitals from './reportWebVitals';
+import * as serviceWorker from './serviceWorker';
+
+const container = document.getElementById('root');
+const root = ReactDOM.createRoot(container);
+
+root.render(
+  <StrictMode>
+    <ColorModeScript />
+    <App />
+  </StrictMode>
+);
+
+// If you want your app to work offline and load faster, you can change
+// unregister() to register() below. Note this comes with some pitfalls.
+// Learn more about service workers: https://cra.link/PWA
+serviceWorker.unregister();
+
+// If you want to start measuring performance in your app, pass a function
+// to log results (for example: reportWebVitals(console.log))
+// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
+reportWebVitals();

src/logo.svg

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+<svg width="582" height="582" viewBox="0 0 582 582" fill="none" xmlns="http://www.w3.org/2000/svg">
+<rect width="582" height="582" rx="291" fill="url(#paint0_linear)"/>
+<path d="M157.521 303.421L355.881 106.426C359.587 102.746 365.55 107.225 363.049 111.809L289.22 247.123C287.573 250.141 289.758 253.821 293.196 253.821H420.782C424.892 253.821 426.877 258.857 423.872 261.661L200.293 470.326C196.284 474.067 190.317 468.796 193.536 464.356L299.373 318.351C301.543 315.357 299.404 311.164 295.706 311.164H160.713C156.67 311.164 154.653 306.27 157.521 303.421Z" fill="white"/>
+<defs>
+<linearGradient id="paint0_linear" x1="291" y1="0" x2="291" y2="582" gradientUnits="userSpaceOnUse">
+<stop stop-color="#7BCBD4"/>
+<stop offset="1" stop-color="#29C6B7"/>
+</linearGradient>
+</defs>
+</svg>

src/reportWebVitals.js

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+const reportWebVitals = onPerfEntry => {
+  if (onPerfEntry && onPerfEntry instanceof Function) {
+    import('web-vitals').then(({ getCLS, getFID, getFCP, getLCP, getTTFB }) => {
+      getCLS(onPerfEntry);
+      getFID(onPerfEntry);
+      getFCP(onPerfEntry);
+      getLCP(onPerfEntry);
+      getTTFB(onPerfEntry);
+    });
+  }
+};
+
+export default reportWebVitals;

src/serviceWorker.js

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+// This optional code is used to register a service worker.
+// register() is not called by default.
+
+// This lets the app load faster on subsequent visits in production, and gives
+// it offline capabilities. However, it also means that developers (and users)
+// will only see deployed updates on subsequent visits to a page, after all the
+// existing tabs open on the page have been closed, since previously cached
+// resources are updated in the background.
+
+// To learn more about the benefits of this model and instructions on how to
+// opt-in, read https://cra.link/PWA
+
+const isLocalhost = Boolean(
+  window.location.hostname === 'localhost' ||
+    // [::1] is the IPv6 localhost address.
+    window.location.hostname === '[::1]' ||
+    // 127.0.0.0/8 are considered localhost for IPv4.
+    window.location.hostname.match(
+      /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
+    )
+);
+
+export function register(config) {
+  if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
+    // The URL constructor is available in all browsers that support SW.
+    const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href);
+    if (publicUrl.origin !== window.location.origin) {
+      // Our service worker won't work if PUBLIC_URL is on a different origin
+      // from what our page is served on. This might happen if a CDN is used to
+      // serve assets; see https://github.com/facebook/create-react-app/issues/2374
+      return;
+    }
+
+    window.addEventListener('load', () => {
+      const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
+
+      if (isLocalhost) {
+        // This is running on localhost. Let's check if a service worker still exists or not.
+        checkValidServiceWorker(swUrl, config);
+
+        // Add some additional logging to localhost, pointing developers to the
+        // service worker/PWA documentation.
+        navigator.serviceWorker.ready.then(() => {
+          console.log(
+            'This web app is being served cache-first by a service ' +
+              'worker. To learn more, visit https://cra.link/PWA'
+          );
+        });
+      } else {
+        // Is not localhost. Just register service worker
+        registerValidSW(swUrl, config);
+      }
+    });
+  }
+}
+
+function registerValidSW(swUrl, config) {
+  navigator.serviceWorker
+    .register(swUrl)
+    .then(registration => {
+      registration.onupdatefound = () => {
+        const installingWorker = registration.installing;
+        if (installingWorker == null) {
+          return;
+        }
+        installingWorker.onstatechange = () => {
+          if (installingWorker.state === 'installed') {
+            if (navigator.serviceWorker.controller) {
+              // At this point, the updated precached content has been fetched,
+              // but the previous service worker will still serve the older
+              // content until all client tabs are closed.
+              console.log(
+                'New content is available and will be used when all ' +
+                  'tabs for this page are closed. See https://cra.link/PWA.'
+              );
+
+              // Execute callback
+              if (config && config.onUpdate) {
+                config.onUpdate(registration);
+              }
+            } else {
+              // At this point, everything has been precached.
+              // It is the perfect time to display a
+              // "Content is cached for offline use." message.
+              console.log('Content is cached for offline use.');
+
+              // Execute callback
+              if (config && config.onSuccess) {
+                config.onSuccess(registration);
+              }
+            }
+          }
+        };
+      };
+    })
+    .catch(error => {
+      console.error('Error during service worker registration:', error);
+    });
+}
+
+function checkValidServiceWorker(swUrl, config) {
+  // Check if the service worker can be found. If it can't reload the page.
+  fetch(swUrl, {
+    headers: { 'Service-Worker': 'script' },
+  })
+    .then(response => {
+      // Ensure service worker exists, and that we really are getting a JS file.
+      const contentType = response.headers.get('content-type');
+      if (
+        response.status === 404 ||
+        (contentType != null && contentType.indexOf('javascript') === -1)
+      ) {
+        // No service worker found. Probably a different app. Reload the page.
+        navigator.serviceWorker.ready.then(registration => {
+          registration.unregister().then(() => {
+            window.location.reload();
+          });
+        });
+      } else {
+        // Service worker found. Proceed as normal.
+        registerValidSW(swUrl, config);
+      }
+    })
+    .catch(() => {
+      console.log(
+        'No internet connection found. App is running in offline mode.'
+      );
+    });
+}
+
+export function unregister() {
+  if ('serviceWorker' in navigator) {
+    navigator.serviceWorker.ready
+      .then(registration => {
+        registration.unregister();
+      })
+      .catch(error => {
+        console.error(error.message);
+      });
+  }
+}

src/setupTests.js

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+// jest-dom adds custom jest matchers for asserting on DOM nodes.
+// allows you to do things like:
+// expect(element).toHaveTextContent(/react/i)
+// learn more: https://github.com/testing-library/jest-dom
+import '@testing-library/jest-dom';

src/test-utils.js

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+import React from 'react';
+import { render } from '@testing-library/react';
+import { ChakraProvider, theme } from '@chakra-ui/react';
+
+const AllProviders = ({ children }) => (
+  <ChakraProvider theme={theme}>{children}</ChakraProvider>
+);
+
+const customRender = (ui, options) =>
+  render(ui, { wrapper: AllProviders, ...options });
+
+export { customRender as render };