- );
- }
+ static propTypes = {
+ id: PropTypes.string.isRequired,
+ codeFigure: PropTypes.string,
+ question: PropTypes.string.isRequired,
+ answers: PropTypes.array.isRequired,
+ incorrectFeedback: PropTypes.node,
+ };
+
+ render() {
+ const { codeFigure, question, answers } = this.props;
+
+ return (
+
+ );
+ }
}
diff --git a/src/registerServiceWorker.js b/src/registerServiceWorker.js
index d97bb39..38164f2 100644
--- a/src/registerServiceWorker.js
+++ b/src/registerServiceWorker.js
@@ -9,109 +9,112 @@
// This link also includes instructions on opting out of this behavior.
const isLocalhost = Boolean(
- window.location.hostname === `localhost` ||
- // [::1] is the IPv6 localhost address.
- window.location.hostname === `[::1]` ||
- // 127.0.0.1/8 is considered localhost for IPv4.
- window.location.hostname.match(
- /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
- )
+ window.location.hostname === `localhost` ||
+ // [::1] is the IPv6 localhost address.
+ window.location.hostname === `[::1]` ||
+ // 127.0.0.1/8 is considered localhost for IPv4.
+ window.location.hostname.match(
+ /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
+ )
);
export default function register() {
- 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);
- 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/facebookincubator/create-react-app/issues/2374
- return;
- }
+ 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);
+ 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/facebookincubator/create-react-app/issues/2374
+ return;
+ }
- window.addEventListener(`load`, () => {
- const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
+ window.addEventListener(`load`, () => {
+ const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
- if (isLocalhost) {
- // This is running on localhost. Lets check if a service worker still exists or not.
- checkValidServiceWorker(swUrl);
+ if (isLocalhost) {
+ // This is running on localhost. Lets check if a service worker still exists or not.
+ checkValidServiceWorker(swUrl);
- // 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://goo.gl/SC7cgQ`
- );
+ // 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://goo.gl/SC7cgQ`
+ );
+ });
+ } else {
+ // Is not local host. Just register service worker
+ registerValidSW(swUrl);
+ }
});
- } else {
- // Is not local host. Just register service worker
- registerValidSW(swUrl);
- }
- });
- }
+ }
}
function registerValidSW(swUrl) {
- navigator.serviceWorker
- .register(swUrl)
- .then((registration) => {
- registration.onupdatefound = () => {
- const installingWorker = registration.installing;
- installingWorker.onstatechange = () => {
- if (installingWorker.state === `installed`) {
- if (navigator.serviceWorker.controller) {
- // At this point, the old content will have been purged and
- // the fresh content will have been added to the cache.
- // It's the perfect time to display a "New content is
- // available; please refresh." message in your web app.
- console.log(`New content is available; please refresh.`);
- } else {
- // At this point, everything has been precached.
- // It's the perfect time to display a
- // "Content is cached for offline use." message.
- console.log(`Content is cached for offline use.`);
- }
- }
- };
- };
- })
- .catch((error) => {
- console.error(`Error during service worker registration:`, error);
- });
+ navigator.serviceWorker
+ .register(swUrl)
+ .then((registration) => {
+ registration.onupdatefound = () => {
+ const installingWorker = registration.installing;
+ installingWorker.onstatechange = () => {
+ if (installingWorker.state === `installed`) {
+ if (navigator.serviceWorker.controller) {
+ // At this point, the old content will have been purged and
+ // the fresh content will have been added to the cache.
+ // It's the perfect time to display a "New content is
+ // available; please refresh." message in your web app.
+ console.log(
+ `New content is available; please refresh.`
+ );
+ } else {
+ // At this point, everything has been precached.
+ // It's the perfect time to display a
+ // "Content is cached for offline use." message.
+ console.log(`Content is cached for offline use.`);
+ }
+ }
+ };
+ };
+ })
+ .catch((error) => {
+ console.error(`Error during service worker registration:`, error);
+ });
}
function checkValidServiceWorker(swUrl) {
- // Check if the service worker can be found. If it can't reload the page.
- fetch(swUrl)
- .then((response) => {
- // Ensure service worker exists, and that we really are getting a JS file.
- if (
- response.status === 404 ||
- response.headers.get(`content-type`).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();
- });
+ // Check if the service worker can be found. If it can't reload the page.
+ fetch(swUrl)
+ .then((response) => {
+ // Ensure service worker exists, and that we really are getting a JS file.
+ if (
+ response.status === 404 ||
+ response.headers.get(`content-type`).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);
+ }
+ })
+ .catch(() => {
+ console.log(
+ `No internet connection found. App is running in offline mode.`
+ );
});
- } else {
- // Service worker found. Proceed as normal.
- registerValidSW(swUrl);
- }
- })
- .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();
- });
- }
+ if (`serviceWorker` in navigator) {
+ navigator.serviceWorker.ready.then((registration) => {
+ registration.unregister();
+ });
+ }
}